IOT Fitness Tracker with Particle Argon

#include <Grove-Ultrasonic-Ranger.h>

float distance1 = 8.0;            // distance you must be from the senor to complete a full rep
int counter = 0;
int led_counter = 1;                                                        
int i;

Ultrasonic ultrasonic(D4);                                                              
void setup()
{
	Serial.begin(9600);                         // Begin serial communications
	pinMode(D2, OUTPUT);                        // Configure pin for output
	pinMode(D3, OUTPUT);                       // Configure pin for output
    pinMode(D7, OUTPUT);                       // Configure pin for output
    pinMode(D7, OUTPUT);
    digitalWrite(D2,HIGH);                    // this makes sure D2 has a starting value
    Particle.subscribe("team7/wolfe/counter", pushupcounter);    //looking at the other particle to see if they did their reps
    

}

void pushupcounter(const char *event, const char *data){    //this is what runs when they complete there reps
    {
    i++;
    Serial.print(i);
    Serial.print(event);
    Serial.print(", data: ");
    if (data)
        Serial.println(data);
       
    else
        Serial.println("NULL");
       
        delay(500);
        digitalWrite(D7, HIGH); //turns blue light on 
    }
}

void loop()
{

	long RangeInCentimeters;                                                          // Variable to hold the distance measurement
	RangeInCentimeters = ultrasonic.MeasureInCentimeters();                           // Retrieves the current distance value
	Serial.print(RangeInCentimeters);                                                 // Out put the value over serial
	Serial.println(" cm");                                                            // use 'particle serial monitor --follow' in the CLI to see serial output

	if (RangeInCentimeters > distance1){                                              // If distance is greater than distance1
	    digitalWrite(D3, HIGH);                                                       // Red led on
	    digitalWrite(D2, LOW);                                                        // Green led off
	    led_counter = 0;

	}
	
	else if (RangeInCentimeters < distance1) {                                        // If distance is less than distance1
	    digitalWrite(D2, HIGH);                                                       // Green led on
	    digitalWrite(D3, LOW);                                                        // Red led off

	    if (led_counter == 0) {                                                       // the led_counter references the variable from the end of the previous loop and compares it to the output of D2 during the current loop. If they are the same (D2 = HIGH) then no rep will be counted. But if rep_counter = LOw, this means  
	        counter = counter +1;
	        Particle.publish("repcomplete", String(counter));                          // publishing every rep you complete
	        delay(500);
	        
	    }
	    
        else if (led_counter == 1){
            counter = counter;
        }
	    
	    led_counter = 1; 
	}

    if (counter == 5){                                                           // when the reps = 5 the particle will publish you did it 
        Particle.publish("team7/salo/counter", "youdiditsalo");
        delay(500);
    }

    }