Rotate Translate Red - OpenProcessing

mySketch

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var counter = 0;
​
function setup() 
{
  createCanvas(windowWidth/2, windowHeight/2);
  background(255,100,100);
}
​
function draw() 
{
  translate(width/2, height/2);
  
  translate(0, cos(counter)*300);
  noFill();
  stroke(255);
  strokeWeight(0.5);
  
  rotate(sin(counter));
  line(0,0,300,80);
  line(30,60,-20,0);
  line(0,80,0,80)
  line(300,80,10,0)
  
  counter += 0.9;
    
}