我不能让连续的画布矩形在js中有重复的线性渐变。有人知道怎么做吗？

<canvas id="myCanvas"></canvas>

var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");

var gradient = ctx.createLinearGradient(0, 0, canvas.width, canvas.height);

gradient.addColorStop(0, "red");
gradient.addColorStop(1, "blue");

ctx.fillStyle = gradient;
ctx.fillRect(0, 0, canvas.width, canvas.height);

<canvas id="myCanvas"></canvas>

<script>
  var canvas = document.getElementById("myCanvas");
  var ctx = canvas.getContext("2d");

  var gradient = ctx.createLinearGradient(0, 0, canvas.width, canvas.height);
  gradient.addColorStop(0, "red");
  gradient.addColorStop(1, "blue");

  ctx.fillStyle = gradient;
  ctx.fillRect(0, 0, canvas.width, canvas.height);
</script>