karabiner element: New Rule (new modifier RightAlt and Space for symbols)

gistfile1.txt

{
    "description": "New Rule (new modifier RightAlt and Space for symbols)",
    "manipulators": [
        {
            "description": "1. State Machine: Right Option triggers layer",
            "from": {
                "key_code": "right_option",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "set_variable": {
                        "name": "right_option_layer_active",
                        "value": 1
                    }
                }
            ],
            "to_after_key_up": [
                {
                    "set_variable": {
                        "name": "right_option_layer_active",
                        "value": 0
                    }
                }
            ],
            "to_if_alone": [{ "key_code": "right_option" }],
            "type": "basic"
        },
        {
            "description": "2. State Machine: Space",
            "from": {
                "key_code": "spacebar",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "set_variable": {
                        "name": "spacebar_layer_active",
                        "value": 1
                    }
                }
            ],
            "to_after_key_up": [
                {
                    "set_variable": {
                        "name": "spacebar_layer_active",
                        "value": 0
                    }
                }
            ],
            "to_if_alone": [{ "key_code": "spacebar" }],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "spacebar_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "h become Left",
            "from": {
                "key_code": "h",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "left_arrow",
                    "modifiers": ["any"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "spacebar_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "j become Down",
            "from": {
                "key_code": "j",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "down_arrow",
                    "modifiers": ["any"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "spacebar_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "k become Up",
            "from": {
                "key_code": "k",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "up_arrow",
                    "modifiers": ["any"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "spacebar_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "l become Right",
            "from": {
                "key_code": "l",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "right_arrow",
                    "modifiers": ["any"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "a -> !",
            "from": {
                "key_code": "a",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "1",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "s -> @",
            "from": {
                "key_code": "s",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "2",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "d -> #",
            "from": {
                "key_code": "d",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "3",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "f -> $",
            "from": {
                "key_code": "f",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "4",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "g -> %",
            "from": {
                "key_code": "g",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "5",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "q -> ^",
            "from": {
                "key_code": "q",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "6",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "w -> &",
            "from": {
                "key_code": "w",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "7",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "e -> *",
            "from": {
                "key_code": "e",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "8",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "z -> (",
            "from": {
                "key_code": "z",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "9",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "x -> )",
            "from": {
                "key_code": "x",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "0",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "c -> _",
            "from": {
                "key_code": "c",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "hyphen",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "v -> +",
            "from": {
                "key_code": "v",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "equal_sign",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "r -> {",
            "from": {
                "key_code": "r",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "open_bracket",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "t -> }",
            "from": {
                "key_code": "t",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "close_bracket",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "right_option_layer_active",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "description": "b -> |",
            "from": {
                "key_code": "b",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "backslash",
                    "modifiers": ["left_shift"]
                }
            ],
            "type": "basic"
        }
    ]
}

Spacebar + Key = Navigation

                +---+---+---+---+
                | H | J | K | L |
                | ← | ↓ | ↑ | → |
                +---+---+---+---+

Right Option + Key = Symbol

+---+---+---+---+---+
| Q | W | E | R | T |
| ^ | & | * | { | } |
+---+---+---+---+---+
  | A | S | D | F | G |
  | ! | @ | # | $ | % |
  +---+---+---+---+---+
    | Z | X | C | V | B |
    | ( | ) | _ | + | | |
    +---+---+---+---+---+