void setup(){
  size(800,600);
  background(#FAFC96);
   rect(700,0,100,100); ellipse(750,50,5,5);
   rect(700,100,100,100); ellipse(750,150,10,10);
   rect(700,200,100,100); ellipse(750,250,15,15);
  fill(255,0,0);rect(0,0,100,100);
  fill(0,255,0);rect(0,100,100,100);
  fill(0,0,255);rect(0,200,100,100);
  fill(0); rect(0,300,100,100);
}

void mousePressed(){
  println(mouseX+" "+mouseY);
  if(mouseX<100 && mouseY<100) stroke(255,0,0);
  else if(mouseX <100 && mouseY<200) stroke(0,255,0);
  else if(mouseX<100 && mouseY<300) stroke(0,0,255);
  else if(mouseX<100 && mouseY<400) stroke(0);
  else if(mouseX<700 && mouseY<100) strokeWeight(5);
  else if(mouseX>700 && mouseY<200) strokeWeight(10);
  else if(mouseX>700 && mouseY<300) strokeWeight(15);
}
void draw(){
  if(mousePressed) line(mouseX, mouseY, pmouseX, pmouseY);
}