// Dartmouth CS 2, Winter 2009, Chris Bailey-Kellogg
// Notes 8 | Sketch 6

void setup()
{
  stroke(255);
  strokeWeight(10);
}

void draw()
{
  background(0);
  float dx = mouseX - width/2;
  float dy = mouseY - height/2;
  float angle = atan2(dy, dx);  

  pushMatrix();
  translate(width/2,height/2);
  rotate(angle);
  line(0,0,25,0);
  popMatrix();
}