Present random shape, then fixed order (assignment help)

Processing
4 
int x = 800;

void setup() {
  size (800, 200);
  background (214, 210, 196);
  noStroke();
  fill (166, 25, 46);
  rect (0, 0, 115, 200);
}


void draw() {
  background (214, 210, 196);
  fill (166, 25, 46);
  rect (0, 0, 115, 200);
  fill (55, 58, 54);
  ellipse (x, 100, 100, 100);
  x = (x - 1);
}

That’s what I have done for now. What I need to do now is to write a program as I said in the red part to the left. I know “random” and “void keyPressed” would do but do not know how to apply to this case.Preformatted text