3-1


void setup(){
  size(600,600);
  //background(0,0,0);
}

void draw(){

  fill(255,255,255);
  rect(mouseX-150,mouseY-150,50,50);

  fill(255,0,0);
  ellipse(mouseX,mouseY,100,100);
}

3-2

void setup(){
  size(600,600);
}
float x=100,y=100;
void draw()
{

  background(0,0,0);
  fill(255,255,0);
  ellipse(mouseX,mouseY,x+30,y+30);
  fill(255,0,0);
  ellipse(x,y,x-30,y-30);

  x=x*0.9 + mouseX*0.1;
  y=y*0.9 + mouseY*0.1;

}

老師作的感覺不難  但給我們做得時候就沒這麼簡單了  所以今天做出來的圖都很簡易  希望以後能更熟練做出更炫的圖