int miyashita_posX;
int miyashita_posY;
int miyashita_speedX;
int miyashita_speedY;
int komatsu_posX;
int komatsu_posY;
int komatsu_speedX;
int komatsu_speedY;
int fukuchi_posX;
int fukuchi_posY;
int fukuchi_speedX;
int fukuchi_speedY;

void setup() {
  size( 400, 300 );
  miyashita_posX = (int)random( 0, width );
  miyashita_posY = (int)random( 0, height );
  miyashita_speedX = (int)random( 1, 5 );
  miyashita_speedY = (int)random( 1, 5 );

  komatsu_posX = (int)random( 0, width );
  komatsu_posY = (int)random( 0, height );
  komatsu_speedX = (int)random( 1, 5 );
  komatsu_speedY = (int)random( 1, 5 );

  fukuchi_posX = (int)random( 0, width );
  fukuchi_posY = (int)random( 0, height );
  fukuchi_speedX = (int)random( 1, 5 );
  fukuchi_speedY = (int)random( 1, 5 );

  fill( 255, 0, 0 );
}

void draw() {
  background( 255 );
  miyashita_posX += miyashita_speedX;
  miyashita_posY += miyashita_speedY;

  komatsu_posX += komatsu_speedX;
  komatsu_posY += komatsu_speedY;

  fukuchi_posX += fukuchi_speedX;
  fukuchi_posY += fukuchi_speedY;

  if ( miyashita_posX > width-15 ) {
    miyashita_posX = width-15;
    miyashita_speedX = -miyashita_speedX;
  }
  if ( miyashita_posX < 15 ) {
    miyashita_posX = 15;
    miyashita_speedX = -miyashita_speedX;
  }
  if ( miyashita_posY > height-15 ) {
    miyashita_posY = height-15;
    miyashita_speedY = -miyashita_speedY;
  }
  if ( miyashita_posY < 15 ) {
    miyashita_posY = 15;
    miyashita_speedY = -miyashita_speedY;
  }

  if ( komatsu_posX > width-15 ) {
    komatsu_posX = width-15;
    komatsu_speedX = -komatsu_speedX;
  }
  if ( komatsu_posX < 15 ) {
    komatsu_posX = 15;
    komatsu_speedX = -komatsu_speedX;
  }
  if ( komatsu_posY > height-15 ) {
    komatsu_posY = height-15;
    komatsu_speedY = -komatsu_speedY;
  }
  if ( komatsu_posY < 15 ) {
    komatsu_posY = 15;
    komatsu_speedY = -komatsu_speedY;
  }

  if ( fukuchi_posX > width-15 ) {
    fukuchi_posX = width-15;
    fukuchi_speedX = -fukuchi_speedX;
  }
  if ( fukuchi_posX < 15 ) {
    fukuchi_posX = 15;
    fukuchi_speedX = -fukuchi_speedX;
  }
  if ( fukuchi_posY > height-15 ) {
    fukuchi_posY = height-15;
    fukuchi_speedY = -fukuchi_speedY;
  }
  if ( fukuchi_posY < 15 ) {
    fukuchi_posY = 15;
    fukuchi_speedY = -fukuchi_speedY;
  }

  ellipse( miyashita_posX, miyashita_posY, 30, 30 );
  ellipse( komatsu_posX, komatsu_posY, 30, 30 );
  ellipse( fukuchi_posX, fukuchi_posY, 30, 30 );
}