1. boolean[] keys = new boolean[526];
   float ypos = 20;
   float ypos1 = 20;
   
   void setup() {
    
     size(displayWidth, displayHeight);
    
   }
   
   void draw(){
    
     ellipse(20, ypos, 30, 30);
     ellipse(60, ypos1, 30, 30);
    
   
    
    
   }
   
   boolean checkKey(String k)
   {
     for(int i = 0; i < keys.length; i++)
       if(KeyEvent.getKeyText(i).toLowerCase().equals(k.toLowerCase())) return keys[i]; 
     return false;
   }
    
   void keyPressed()
   {
     keys[keyCode] = true;
    
    
       if (key == 'w') {
         ypos += 5;
       }
    
    
    
       if (key == 'o') {
         ypos1 += 5;
       }
    
    
   }
    
   void keyReleased()
   {
     keys[keyCode] = false;
   }

maybe its because im beginner and dont know how to use your example... but pls answer.