Vega-lite Arrow Direction

spec.json

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "config": {"view": {"stroke": ""}},
  "width": 800,
  "height": 200,
  "data": {
    "values": [
      {"direction": "right", "col": 3},
      {"direction": "right", "col": 2},
      {"direction": "right", "col": 1},
      {"direction": "up", "col": 2},
      {"direction": "up", "col": 1},
      {"direction": "left", "col": 10},
      {"direction": "left", "col": 9},
      {"direction": "left", "col": 8},
      {"direction": "left", "col": 7},
      {"direction": "left", "col": 6},
      {"direction": "left", "col": 5},
      {"direction": "left", "col": 4},
      {"direction": "left", "col": 3},
      {"direction": "left", "col": 2},
      {"direction": "left", "col": 1},
      {"direction": "right", "col": 9},
      {"direction": "right", "col": 8},
      {"direction": "right", "col": 7},
      {"direction": "right", "col": 6},
      {"direction": "right", "col": 5},
      {"direction": "right", "col": 4},
      {"direction": "right", "col": 3},
      {"direction": "right", "col": 2},
      {"direction": "right", "col": 1},
      {"direction": "up", "col": 6},
      {"direction": "up", "col": 5},
      {"direction": "up", "col": 4},
      {"direction": "up", "col": 3},
      {"direction": "up", "col": 2},
      {"direction": "up", "col": 1},
      {"direction": "left", "col": 7},
      {"direction": "left", "col": 6},
      {"direction": "left", "col": 5},
      {"direction": "left", "col": 4},
      {"direction": "left", "col": 3},
      {"direction": "left", "col": 2},
      {"direction": "left", "col": 1},
      {"direction": "down", "col": 0}
    ]
  },
  "mark": {"type": "point", "filled": true},
  "encoding": {
    "x": {"field": "col", "type": "ordinal", "axis": null},
    "y": {"field": "direction", "type": "ordinal", "axis": null},
    "shape": {
      "field": "direction",
      "type": "nominal",
      "scale": {
        "domain": ["down", "right", "up", "left"],
        "range": [
          "M2.51755 2.99998L2.51755 0.70874L0.949572 0.70874L0.949572 2.99998H-4.86374e-05L1.70872 4.70874L3.41748 2.99998H2.51755Z",
          "M2.79124 0.899931H0.5V2.46791H2.79124V3.41753L4.5 1.70876L2.79124 0V0.899931Z",
          "M1.19119 2.41751V4.70874H2.75917V2.41751H3.70879L2.00002 0.70874L0.29126 2.41751H1.19119Z",
          "M2.41751 2.51755L4.70874 2.51755V0.949572L2.41751 0.949572V-4.86374e-05L0.70874 1.70872L2.41751 3.41748V2.51755Z"
        ]
      },
      "legend": null
    },
    "color": {
      "field": "direction",
      "type": "nominal",
      "legend": null,
      "scale": {
        "domain": ["down", "right", "up", "left"],
        "range": [
          "rgb(162,160,152)",
          "rgb(194,81,64)",
          "rgb(93,93,93)",
          "rgb(91,131,149)"
        ]
      }
    },
    "opacity": {"value": 1},
    "size": {"value": 200}
  }
}