BLDC Motor control through Serial Monitor

Recently, I make a quadcopter.
I have a question for that.
The attached file is to control more than one motor/esc with an Arduino.
When this code compile, one motor is working but, the other motor is not working.
I don’t know what the problem is.
Please give me a hand!!!

SM_ESC2.ino (3.45 KB)

Please post the code here (in code tags) to make it easier to access and give advice on.

I hope that you are not hoping to fly the quad using command entered from the Serial monitor.