I have been working on a simulation where a man walks through a house. My problem is that I do not know how to set variables to backgrounds. In mine, I have made it so that if I press E in front of a stove, it turns on by changing the background. If I am in a different background and I am in the same coordinates, My room will change. Is there a way to work around this, because I can't set backgrounds as variables. Here is my messy code so far:
PImage img;
PImage front;
PImage back;
PImage left;
PImage right;
PImage stove;
PImage sink;


int x = 150;
int y = 150;
void setup(){
  size(492, 414);
  frameRate(90);
  img = loadImage("kitchen1.PNG");
  sink = loadImage("sink.png");
  stove = loadImage("stove.PNG");
  front = loadImage("frontchef.png");
  back = loadImage("backchef.png");
  right = loadImage("rightchef.png");
  left = loadImage("leftchef.png");
  background(img);
}
void draw(){
  background(img);
  if (keyPressed){
    if(key == 'e'){
      if(((x > 0) && (x < 50) && (y < 60))){
        img = loadImage("stove.PNG");
      }else{
        img = loadImage("kitchen1.PNG");
      if(((x > 200) && (x < 359) && (y < 60))){
        img = loadImage("sink.png");
      }else{
        img = loadImage("kitchen1.PNG");
      }
      } 
    }
  }
  if(keyPressed){
    if((((key == 'd')||(key == 'w')||(key == 'a')||(key == 's')))){
      tint(255,0);
    }
  }
  image(back, x, y);
  if (keyPressed){
    if (key == 'd'){
      tint(255,255);
      image(right, x, y);
      back = loadImage("rightchef.png");
      x++;
    }
  if (key == 'w'){
    tint(255,255);
    image(back, x, y);
    back = loadImage("backchef.png");
      y--;
    }
  if (key == 'a'){
    tint(255,255);
    image(left, x, y);
    back = loadImage("leftchef.png");
      x--;
    }
  if (key == 's'){
    tint(255,255);
    image(front, x, y);
    back = loadImage("frontchef.png");
      y++;
    if((y > 88) && (x > 165)){
    y--;
    }
    } 
  }
  if(y > 225){
    y--;
  }
  if(y < 50){
    y++;
  }
  if(x > 400){
    x--;
  }
  if(x < 0){
    x++;
  }
  if((y > 88) && (x > 165)){
   x--;
  }
  if((y > 88) && (x > 165)){
   y--;
  }
  if(keyPressed){
    if (key == 'q'){
      if (x > 350){
        img = loadImage("TheoreticalBackground.PNG");
      }
    }
  }       
}