Circle with line endings sticking out

ruins.dot

{
  "layers": [
    [
      {
        "type": "arc_c",
        "verteces": [
          {
            "x": 150,
            "y": 240
          },
          {
            "x": 60,
            "y": 150
          },
          {
            "x": 60,
            "y": 150
          },
          {
            "x": 150,
            "y": 60
          },
          {
            "x": 150,
            "y": 60
          },
          {
            "x": 240,
            "y": 150
          },
          {
            "x": 240,
            "y": 150
          },
          {
            "x": 150,
            "y": 240
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 210,
            "y": 180
          },
          {
            "x": 210,
            "y": 120
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 210,
            "y": 180
          },
          {
            "x": 195,
            "y": 195
          },
          {
            "x": 195,
            "y": 195
          },
          {
            "x": 195,
            "y": 225
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 195,
            "y": 135
          },
          {
            "x": 195,
            "y": 195
          },
          {
            "x": 195,
            "y": 195
          },
          {
            "x": 210,
            "y": 180
          },
          {
            "x": 210,
            "y": 180
          },
          {
            "x": 210,
            "y": 180
          },
          {
            "x": 195,
            "y": 195
          },
          {
            "x": 195,
            "y": 195
          },
          {
            "x": 210,
            "y": 180
          },
          {
            "x": 210,
            "y": 180
          },
          {
            "x": 210,
            "y": 120
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 180,
            "y": 135
          },
          {
            "x": 180,
            "y": 240
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 165,
            "y": 105
          },
          {
            "x": 165,
            "y": 240
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 150,
            "y": 120
          },
          {
            "x": 150,
            "y": 240
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 135,
            "y": 105
          },
          {
            "x": 135,
            "y": 240
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 120,
            "y": 90
          },
          {
            "x": 120,
            "y": 240
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 105,
            "y": 120
          },
          {
            "x": 105,
            "y": 225
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 90,
            "y": 120
          },
          {
            "x": 90,
            "y": 180
          },
          {
            "x": 90,
            "y": 180
          },
          {
            "x": 105,
            "y": 195
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 105,
            "y": 195
          },
          {
            "x": 90,
            "y": 180
          }
        ]
      },
      {
        "type": "line",
        "verteces": [
          {
            "x": 210,
            "y": 180
          },
          {
            "x": 210,
            "y": 150
          }
        ]
      }
    ],
    [],
    []
  ],
  "styles": [
    {
      "thickness": 10,
      "strokeLinecap": "butt",
      "strokeLinejoin": "miter",
      "color": "#000000",
      "fill": "none",
      "dash": [
        0,
        0
      ]
    },
    {
      "thickness": 5,
      "strokeLinecap": "round",
      "strokeLinejoin": "round",
      "color": "#777",
      "fill": "none",
      "dash": [
        0,
        0
      ]
    },
    {
      "thickness": 5,
      "strokeLinecap": "round",
      "strokeLinejoin": "round",
      "color": "#444",
      "fill": "none",
      "dash": [
        0,
        0
      ]
    }
  ]
}

Totally a hack, as this does not follow the grid.
But it gives you the expected result.
I've left the second layer's color white so you can see what it looks like.
If your theme uses a light background, make sure to change its color to black.