Rotate Translate - OpenProcessing

mySketch
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var counter = 0;
​
function setup()
{
  createCanvas(windowWidth, windowHeight);
  background(255,130,1);
}
​
function draw()
{
  //background(0);
​
  translate(width/2, height/2);
​
  translate(0, cos(counter)*300);
  noFill();
  stroke(255);
  //ellipse(0, 0, 150, 150);
  //rotate(0.2);
  rotate(sin(counter));
  line(0, 0, 300, 0);
  line(0, 0, -300, 0);
​
  counter += 0.1;
}