a simple 2 player lightbike game in processing using WASD and ARROW Keys

lightbikegame.pde

///a simple 2 player lightbike game in processing using WASD and Arrow Keys. 

//game params
int speed = 4;
int playerSize = speed + 1 ;
color p1color = color(255, 255, 0); //must have green for detection
color p2color = color(0, 255, 255); //must have green for detection

//player alive?
int player1status = 1;
int player2status = 1;
float p1detection;
float p2detection;

//player positions
int p1x;
int p1y; 
int p2x;
int p2y;
String p1loc = "right";
String p2loc = "left";

void setup(){
  size(1000,1000);
  background(0);
  
  //starting positions
  p1x = playerSize *2;
  p1y = playerSize *2;
  p2x = width - playerSize *2;
  p2y = height - playerSize *2;
  
  rectMode(CORNER); 
  strokeWeight(10);
  stroke(0,255,0);
  fill(0,0,0);
  rect(0,0,width,height);
} //close setup

void draw(){

  //background(0);
  rectMode(CENTER); 
  noStroke();
  
  if( player1status == 0){ //player 1 lost
    rectMode(CORNER); 
    strokeWeight(10);
    stroke(p2color);
    fill(0,0,0);
    rect(0,0,width,height);
    p1loc = "stopped";
    p2loc = "stopped";
  } 
  
  //p1
  if (p1loc == "right"){
    p1x = p1x + speed;
  }else if (p1loc == "left"){
    p1x = p1x - speed;
  }else if (p1loc == "up"){
     p1y = p1y - speed;
  } else if (p1loc == "down"){
     p1y = p1y + speed;
  }
  
  loadPixels();
  p1detection = green(pixels[p1x + p1y * width]);
  println(p1detection);
  if(p1detection == 0){
  println("allgood");
  } else{
  println("1 hit something");
  player1status = 0;
  }
   
  fill(p1color); //player 1 color
  rect(p1x,p1y, playerSize, playerSize);
   //rect(width/2,height/2, 100,100); //testing
  
  
  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
  if(player2status == 0){ //player 2 lost
   rectMode(CORNER); 
    strokeWeight(10);
    stroke(p1color);
    fill(0,0,0);
    rect(0,0,width,height);
    p1loc = "stopped";
    p2loc = "stopped";
  }
 
  //p2
    if (p2loc == "right"){
    p2x = p2x + speed;
  }else if (p2loc == "left"){
    p2x = p2x - speed;
  }else if (p2loc == "up"){
     p2y = p2y - speed;
  } else if (p2loc == "down"){
     p2y = p2y + speed;
  }
  
  loadPixels();
  p2detection = green(pixels[p2x + p2y * width]);
  println(p2detection);
  if(p2detection == 0){
  println("allgood");
  } else{
  println("2 hit something");
  player2status = 0;
  }
  
  fill(p2color); //player 2 color
  rect(p2x,p2y,playerSize,playerSize);
  //rect(width/2,height/2, 100,100); //testing
  
} //close draw

void keyPressed(){
    if (key == CODED) {
      if (keyCode == RIGHT) {
        p2loc  = "right";
      } else if (keyCode == LEFT) {
        p2loc  = "left";
      } else if (keyCode == DOWN) {
        p2loc  = "down";
      } else if (keyCode == UP) {
        p2loc  = "up";
      }  
      } //close coded
      
      if(key == 'd'){ //right
        p1loc  = "right";
      } else if(key == 'a'){ //left
        p1loc  = "left";
      } else if (key == 's'){ //down
        p1loc  = "down";
      } else if( key == 'w'){ //up
        p1loc  = "up";
      }
      
  } // close keypressed