Quad Drawing

float[]xpoints = new float[4];

float[]ypoints = new float[4];

float[]xtarget = new float[4];

float[]ytarget = new float[4];

​

void setup(){

  size(800,800);

  background(255);

  fill(255,255,255,0);

  stroke(0,0,0,15);

  //initialize points and target

  for(int i=0; i<4; i++){

    xpoints[i] = random(width);

    ypoints[i] = random(height);

    xtarget[i] = random(width);

    ytarget[i] = random(height);

  }

}

​

void draw(){

  quadDrawer();

  quadCompare();

}

​

void quadDrawer(){

   quad(xpoints[0],ypoints[0],xpoints[1],ypoints[1],xpoints[2],ypoints[2],

     xpoints[3],ypoints[3]);

}

​

void quadCompare(){

  for(int i=0; i<4; i++){

    if(int(xpoints[i])<int(xtarget[i])){

      xpoints[i]+=1;

    }

    if(int(xpoints[i])>int(xtarget[i])){

      xpoints[i]-=1; 

    }

    if(int(xpoints[i])==int(xtarget[i])){

      xtarget[i] = random(width); 

    }

    if(int(ypoints[i])<int(ytarget[i])){

      ypoints[i]+=1;

    }

    if(int(ypoints[i])>int(ytarget[i])){

      ypoints[i]-=1; 

    }

    if(int(ypoints[i])==int(ytarget[i])){

      ytarget[i] = random(height); 

    }

  } 

}

​