#include <Arduino.h>

// Function prototypes
long readUltrasonicDistance(int triggerPin, int echoPin);
void controlOutputs(double distance);

void setup() {
    pinMode(6, OUTPUT); // Set pin 6 as OUTPUT
    pinMode(9, OUTPUT); // Set pin 9 as OUTPUT
    pinMode(13, OUTPUT); // Set pin 13 as OUTPUT
    pinMode(11, OUTPUT); // Set pin 11 as OUTPUT
}

void loop() {
    long distance = readUltrasonicDistance(7, 8); // Use actual trigger and echo pins
    controlOutputs(0.01723 * distance); // Convert to distance
    delay(10); // Optional delay
}