float [] xp = new float[0];
float [] yp = new float[0];
int numObjects = 0;
int tol2 = 15;
void setup(){
  size(300,300);
   xp = append(xp,random(10,width-10));
   yp = append(yp,random(10,height-10));
}
void draw(){
  background(255);
  for(int i=0; i<xp.length; i++)
    rect(xp[i],yp[i],10,10);
}
void keyPressed(){
  int k = 0;
  while(true){
    boolean overlap = false;
    float xrand = random(xp[xp.length-1]-tol2,xp[xp.length-1]+tol2);
    float yrand = random(yp[yp.length-1]-tol2,yp[yp.length-1]+tol2);
    for(int j=0; j<xp.length; j++){
      float distance = dist(xrand,yrand,xp[j],yp[j]);
      if(distance < 10 || xrand>width-10 || xrand<1 || yrand >height-10 || yrand<1) overlap = true;
    }
    if(overlap==false){
      xp = append(xp,xrand);
      yp = append(yp,yrand);
      tol2 = 15;
      break; 
    }
    k++;
    if(k>1000){
      //println(xp.length + " impass"); 
      tol2+=10;
      break;
    }
  }
  //println(numObjects++);
  //save("stoch"+nf(numObjects,2)+".jpg");
}