Initial Coordinate System

<svg width="600" height="400">
  <g style="fill:none; stroke:white; stroke-width:3">
    <path d="M0 1.5 L600 1.5" />
    <path d="M1.5 0 L1.5 400" />
  </g>
 
  <g style="fill:lime; stroke:none">
    <rect x="0" y="0" width="10" height="10" />
    <rect x="590" y="0" width="10" height="10" />
    <rect x="0" y="390" width="10" height="10" />
  </g>
 
  <g style="font-size:48; font-weight:bold; fill:white">
    <text x="10" y="48">(0,0)</text>
    <text x="450" y="48">(600,0)</text>
    <text x="10" y="390">(0,400)</text>
  </g>
</svg>