move with keys

gistfile1.txt

int x = 100;
int y = 100;

color circleColour = color(0,0,0);

void setup(){
  size(200,200);
  noStroke();
}

void draw(){
  //background(140);
  
  if(keyPressed){
    
    if(key == 'a' || key == 'A'){
      x = x -1;
    }
    
    if(key == 'd'){
      x = x +1;
    }
    
    if(key == 'p'){
      background(140);
    }
    
    if(key == 'g'){
      circleColour = color(0,255,0);
    }
    
    if(key == 'r'){
      circleColour = color(255,0,0);
    }  
  }
  
  fill(circleColour);
  ellipse(x,y,10,10);
}