第七周

int R=5;
PImage imgoil;
PImage imgbullet;
PImage imgiron;
PImage imgarumi;

float []thingX= new float[5], thingY= new float[5], thingType=new float[5];
void setup() {
  size(400, 600);
  imgoil=loadImage("oil.jpg");
  imgbullet=loadImage("bullet.jpg");
  imgiron=loadImage("iron.jpg");
  imgarumi=loadImage("arumi.jpg");
  for (int i=0;i<R;i++) {
    newThing(i);
  }
}
void draw() {
  background(255);
  for (int i=0;i<R;i++) {
    if (thingType[i]==1)drawG(i);
    else if (thingType[i]==2)drawB(i);
    else if (thingType[i]==3)drawT(i);
    else if (thingType[i]==4)drawA(i);
    thingY[i]+=5;
    if (thingY[i]>600)newThing(i);
  }
}
void newThing(int i) {
  thingY[i]=-random(200);
  thingX[i]=random(400);
  thingType[i]=int(random(4))+1;
}
void drawG(int i) {
  image(imgoil, thingX[i], thingY[i], 40, 40);
}
void drawB(int i) {
  image(imgbullet, thingX[i], thingY[i], 40, 40);
}
void drawT(int i) {
  image(imgiron, thingX[i], thingY[i], 40, 40);
}
void drawA(int i) {
  image(imgarumi, thingX[i], thingY[i], 40, 40);
}