/*
Task
- add in statements that accomplish the following:
    - If the distance is less than 100cm, 
    a message should tell you that you are too close.
  - If the distance is between 100 and 400cm another message should be displayed.
*/


int trigPin = 3; // sends out signal 
int echoPin = 2; // receives signal 


void setup() {
 pinMode(trigPin, OUTPUT);
 pinMode(echoPin, INPUT);

 Serial.begin(9600);

} // end of void setup

void loop() {
  // start a new measurment 
 digitalWrite(trigPin, HIGH);
 delayMicroseconds(10);
 digitalWrite(trigPin, LOW);
 
 int duration = pulseIn(echoPin, HIGH); // measuring the time it takes for the signal to return

 int centimeter = duration/58;

 Serial.print("Distance in cm: ");
 Serial.print(centimeter); // converts to cm
 Serial.println("   ");

 Serial.print("Distance in inches: ");
 Serial.print(duration/148); // converts to inches 
 Serial.println("   ");

 delay(1000);

  if (centimeter < 100){
    Serial.print("            ");
    Serial.println("TOO CLOSE, MOVE BACK");

  } // end of if 

  if (centimeter > 100){ 
    Serial.print("            ");
    Serial.println("Maintain Distance");
  } // end of if




} // end of void loop