// Constants
const int pulsePin = 8; // Arduino pin 9 for the pulse output

void setup() {
  Serial.begin(9600); // Initialize serial communication
  pinMode(pulsePin, OUTPUT); // Set pulsePin as output
  Serial.println("pls enter numbers");
}

void loop() {
  while (Serial.available() == 0) {
    delay(10);
  }
  float highTime = Serial.parseFloat(); // Read float value from serial input

  // Check if the value is within the valid range (1 to 2 ms)

  // Calculate low time
  float lowTime = 20.0 - highTime;

  // Generate the pulse
  for (int i = 0; i <= 30; i++)
  {
    digitalWrite(pulsePin, HIGH); // Set pulsePin high
    delayMicroseconds(highTime * 1000); // Delay for the high time
    digitalWrite(pulsePin, LOW); // Set pulsePin low
    delayMicroseconds(lowTime * 1000); // Delay for the remaining cycle time
  }

}