SL_Lavalamp - OpenProcessing

mySketch
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int NoB = 10;
float rad = -40;
​
int num_parts = NoB;
Blob[] b = new Blob[num_parts];
​
​
void setup(){
  size(500, 800);
  background(#fdc520); 
  
  for(int a = 0; a < num_parts; a++){
    b[a] = new Blob();
  }
  
}
​
void draw(){
  background(#a80d45); 
  fill(#a62051);
   quad(170, 200, 110, 610,  400, 610 ,350 , 200 );
 
  for(int a = 0; a < num_parts; a++){
    b[a].update();
    b[a].Display1();
  }
  for(int a = 0; a < num_parts; a++){
    b[a].Display2();
  }
    fill(#762056, 80);
    noStroke();
   quad (280, 200,  300, 610, 400, 610, 350, 200); 
  stroke(#491c5a);
  noFill();
  strokeWeight(7);
  quad(170, 200, 110, 610,  400, 610 ,350 , 200 );
  fill(#692c82);
  quad(200,40, 170, 200, 350, 200, 320, 40);
  quad(110, 610, 160, 700, 350, 700, 400, 610 );
  quad(160, 700, 130, 780, 370, 780, 350, 700 );
  fill(#47205c);
  noStroke();
  quad(280, 40, 280, 200, 350, 200, 320, 40);
  quad(300,610,290,700, 350, 700, 400, 610);
  fill(#411d54);
  quad (290,700, 290, 780, 370, 780, 350,700);
​
​
}
​
class Blob{
  float x1;
  float y1;
  float rad1;
  float thet;
  float velo = 0.1;
  
  Blob(){
    x1 = width/2;
    y1 = height/2;
    rad1 = rad + random(90, 160);
    thet = random(0, PI);
  }
  
  void update(){
    thet = thet + random(-.02, .03);
    
    //gives the balls movement
    x1 = x1 + (velo * cos(thet));
    y1 = y1 + (velo * sin(thet));
    
    
    if(x1 < (0 + rad1*10) ){
      thet = thet + (PI / 2);
    }
    if(x1 > (width - (rad1*10)) ){
      thet = thet + (PI / 2);
    }
    if(y1 < (0 + (rad1*10)) ){
      thet = thet + (PI / 2);
    }
    if(y1 > (height - (rad1*10)) ){
      thet = thet + (PI / 2);
    }
    
    //Hit detection, but it is in a straight line. 
    //if you wanted to make it more specific and slant, you can hit detect at different points by && (y1 < or > whatever point on the screen 
    if( (x1 < 205) || (x1 > width-200) ) {
      velo = velo*-1;
    }
​
    if( (y1 < 150) || (y1 > height-100) ) {
      velo = velo*-1;
    }
    
  }
  
  void Display1(){
    fill(239,38,68,200);
    noStroke();
    ellipse(x1, y1, rad1, rad1);
  }
​
  void Display2(){
    fill(255,100,0, 150);
    noStroke();
    ellipse(x1, y1, rad1, rad1);
  }
}