Arduino code
void setup()
{
Serial.begin(9600);
}
void loop()
{
if (Serial.available() > 4)
{
int Motor1= Serial.read();
analogWrite (3, Motor1);
int Motor2 = Serial.read();
analogWrite (5, Motor2);
int Motor3 = Serial.read();
analogWrite (6, Motor3);
int Motor4 = Serial.read();
analogWrite (9,Motor4);
Serial.flush();
Serial.print(255, BYTE);
}
}