int acounter = 0;

void setup()
{
  size(400,400);
  background(255);
}

void draw()
{
  fill(acounter%255);
  if (acounter%2 == 0)
  {
    drawLessCrazyShape(acounter%width,acounter%height,60);
  }
  else
  {
    drawCrazyShape(width-(acounter%width),height-(acounter%height));
  }
  acounter++;
}

void mousePressed()
{
    fill(mouseX,0,mouseY);
    drawCrazyShape(mouseX, mouseY);
}

void mouseDragged()
{
   fill(255,0,0);
   drawLessCrazyShape(mouseX,mouseY,50);
}

void drawCrazyShape(int x, int y)
{
  beginShape(POLYGON); 
    vertex(x, y); 
    x = x/(y+1)*2;
    vertex(x, y);
    y++;
    x--; 
    vertex(x, y); 
    y = x/(y+1)*2;
    vertex(x, y);
    x -= 30; 
    vertex(x, y); 
    vertex(y*2, x); 
  endShape();
}

void drawLessCrazyShape(int one, int two, int size)
{
  beginShape(POLYGON); 
    
    vertex(one, two); 
    
    one -= size;
    two += size;
    vertex(one, two);
    
    one -= size;
    two -= size;
    vertex(one, two); 

    one += size;
    two -= size;
    vertex(one, two);

    one -= size;
    two += size;
    vertex(one, two); 
    
  endShape();
}