HelloWorld - OpenProcessing

mySketch
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int bground = 100;
color c = color(50, 55, 100);
​
void setup(){
  size(2000,2000);
}
​
void draw(){
  rect(mouseX, mouseY, 10, 10);
  line(mouseX, mouseY, 0, 0);
  ellipseMode(CENTER);
  ellipse(100, 100, 100, 100);
  fill(c);
  stroke(100);
}
​
void mousePressed(){
  if(bground==100){
    background(255, 204, 0);
    bground = 0;
    stroke(0);
  }
  else{
    background(51);
    bground = 100;
    stroke(100);
  }
}