uint8_t packet[3];

static void formPacket(bool leftClick, bool rightClick, uint8_t x, uint8_t y)
{
  packet[0] = (1<<6) | (leftClick<<5) | (rightClick<<4);
  packet[0] |= ((y>>6) & 0x3) << 2;
  packet[0] |= ((x>>6) & 0x3);
  packet[1] = x & 0x3F;
  packet[2] = y & 0x3F;
}
void setup() {
  Serial.begin(1200);
  for(int i=0; i<200; i++)
    Serial.write('M');
}

int count=256;
int pos=0;
int d[][2]={
  {1,0},
  {0,1},
  {-1,0},
  {0,-1},
  {0,0},
};

int Speed=8;

void loop() {
  while(1)
  {
    formPacket(0, 0, d[pos][0]*Speed, d[pos][1]*Speed);
    Serial.write(packet,3);
    count-=Speed;
    if(count<0)
    {
      count=200;
      pos++;
      if(d[pos][0]==0 && d[pos][1]==0)
        pos=0;
    }
    Serial.flush();
    delay(25);
  }
}