I am new to processing and i am trying to make another image come out of a previous image i have already made. my first thought was to use mouse clicks but nothing but the first mouseclick remains on screen. I am specifically making a gingerbread man and am trying to cut it out of a picture of dough that I made. i want the viewer to be able to "shape" the dough into a gingerbread man by clicking the mouse but i cant get my dough to go away and only the gingerbread man to be visible. this is what i have so far.


void setup() {
  size (600,600);
  background(124,122,122);
  smooth();
  noStroke();
}

void draw(){
 noStroke();
 fill(216,175,63);
 ellipse (300,100, 150,150);
 ellipse (300, 300, 150, 300);
 ellipse (260, 450, 60, 300);
 ellipse (340, 450, 60, 300);


 
 //eyes

 fill(0);
 ellipse (270,75, 25,25);
 ellipse (330,75,25,25);
 fill(255);
 ellipse (265,70,5,5);
 ellipse (325, 70,5,5);
 
 //smile
 noFill();
 strokeWeight (4);
stroke(255);
 curve(100, 0, 250, 130,350, 130, 400, 0);
 

 
 //buttons
 fill (249,9,26);
 ellipse (300, 300, 30,30);
 ellipse (300, 230, 30,30);
 ellipse (300, 370, 30,30);
 
 //arms
pushMatrix();
translate(200,250);
rotate(PI/4.0);
 noStroke();
 fill(216,175,63);
 ellipse (0, 0, 60, 200);
 popMatrix();
 
pushMatrix();
translate(400,250);
rotate(PI/-4.0);
noStroke();
fill(216,175,63);
ellipse (0,0,60,200);
popMatrix();

 //icing
 pushMatrix();
translate(100,300);
rotate(PI/4.0);
 noFill();
 strokeWeight(4);
 stroke(255);
 curve (0,0, 30,15,60,15,90,0);
 popMatrix();

}








dough:
void setup() {
  size (600,600);
  background(124,122,122);
  smooth();
  noStroke();
}

void draw(){
  noStroke();
  fill(216,175,63);
  ellipse(300,300,300,300);
  ellipse(200,200,100,100);
  ellipse(250,150,150,150);
  ellipse(325,180,100,100);
  ellipse(400,300,150,150);
  ellipse(200,400,100,100);
 
  fill(216,175,63);
   ellipse(165,325,100,150);
}