a post with plotly.js

This is an example post with some plotly code.

```plotly
{
  "data": [
    {
      "x": [1, 2, 3, 4],
      "y": [10, 15, 13, 17],
      "type": "scatter",
      "line": {
        "color": "#2563eb"
      }
    },
    {
      "x": [1, 2, 3, 4],
      "y": [16, 5, 11, 9],
      "type": "scatter",
      "line": {
        "color": "#06b6d4"
      }
    }
  ],
  "layout": {
    "colorway": ["#2563eb", "#06b6d4", "#f59e0b", "#ef4444"]
  }
}
```

Which generates:

{
  "data": [
    {
      "x": [1, 2, 3, 4],
      "y": [10, 15, 13, 17],
      "type": "scatter",
      "line": {
        "color": "#2563eb"
      }
    },
    {
      "x": [1, 2, 3, 4],
      "y": [16, 5, 11, 9],
      "type": "scatter",
      "line": {
        "color": "#06b6d4"
      }
    }
  ],
  "layout": {
    "colorway": ["#2563eb", "#06b6d4", "#f59e0b", "#ef4444"]
  }
}

Also another example chart.

```plotly
{
  "data": [
    {
      "x": [1, 2, 3, 4],
      "y": [10, 15, 13, 17],
      "mode": "markers",
      "marker": {
        "color": "#2563eb"
      }
    },
    {
      "x": [2, 3, 4, 5],
      "y": [16, 5, 11, 9],
      "mode": "lines",
      "line": {
        "color": "#06b6d4"
      }
    },
    {
      "x": [1, 2, 3, 4],
      "y": [12, 9, 15, 12],
      "mode": "lines+markers",
      "line": {
        "color": "#f59e0b"
      },
      "marker": {
        "color": "#f59e0b"
      }
    }
  ],
  "layout": {
    "title": {
      "text": "Line and Scatter Plot"
    },
    "colorway": ["#2563eb", "#06b6d4", "#f59e0b", "#ef4444"]
  }
}
```

This is how it looks like:

{
  "data": [
    {
      "x": [1, 2, 3, 4],
      "y": [10, 15, 13, 17],
      "mode": "markers",
      "marker": {
        "color": "#2563eb"
      }
    },
    {
      "x": [2, 3, 4, 5],
      "y": [16, 5, 11, 9],
      "mode": "lines",
      "line": {
        "color": "#06b6d4"
      }
    },
    {
      "x": [1, 2, 3, 4],
      "y": [12, 9, 15, 12],
      "mode": "lines+markers",
      "line": {
        "color": "#f59e0b"
      },
      "marker": {
        "color": "#f59e0b"
      }
    }
  ],
  "layout": {
    "title": {
      "text": "Line and Scatter Plot"
    },
    "colorway": ["#2563eb", "#06b6d4", "#f59e0b", "#ef4444"]
  }
}