Rover Code, WIP (work in progress)

#include <Servo.h>
const int pingPin = 7;
const int minsafedistance = 5;
int rightDistance, leftDistance;
int leftMotor2 = 3;
int leftMotor7 = 4;
int rightMotor10 = 5;
int rightMotor15 = 6;
long duration, distance;
Servo servo;


// SETUP

void setup()
{
  servo.attach(8);
  pinMode(leftMotor2, OUTPUT);
  pinMode(leftMotor7, OUTPUT);
  pinMode(rightMotor10, OUTPUT);
  pinMode(rightMotor15, OUTPUT);
}


// LOOP

void loop()
{
  lookForward();
  int fwdDistance = ping();
  if(fwdDistance>minsafedistance)
  {
    GoForward();
  }
  else
  {
    // this section is incomplete
    lookRight();
    rightDistance = ping();
    delay(100);
    lookLeft();
    leftDistance = ping();
    delay(100);
  }
}


// FUNCTIONS

long ping()
{
  pinMode(pingPin, OUTPUT);
  digitalWrite(pingPin, LOW);
  delayMicroseconds(2);
  digitalWrite(pingPin, HIGH);
  delayMicroseconds(5);
  digitalWrite(pingPin, LOW);

  pinMode(pingPin, INPUT);
  duration = pulseIn(pingPin, HIGH);
  distance = (duration/2) /29.3866996;
  return distance;
}

//---------------------------------------------------------

void GoForward()
{
  digitalWrite(leftMotor7, LOW);
  digitalWrite(leftMotor2, HIGH);
  digitalWrite(rightMotor15, LOW);
  digitalWrite(rightMotor10, HIGH);
}

//---------------------------------------------------------

void GoBackward()
{
  digitalWrite(leftMotor2, LOW);
  digitalWrite(leftMotor7, HIGH);
  digitalWrite(rightMotor10, LOW);
  digitalWrite(rightMotor15, HIGH);
}

//---------------------------------------------------------

void GoLeft()
{
  digitalWrite(leftMotor2, LOW);
  digitalWrite(leftMotor7, HIGH);
  digitalWrite(rightMotor15, LOW);
  digitalWrite(rightMotor10, HIGH);
}

//---------------------------------------------------------

void GoRight()
{
  digitalWrite(leftMotor7, LOW);
  digitalWrite(leftMotor2, HIGH);
  digitalWrite(rightMotor10, LOW);
  digitalWrite(rightMotor15, HIGH);
}

//---------------------------------------------------------

void Stop()
{
  digitalWrite(leftMotor7, LOW);
  digitalWrite(leftMotor2, LOW);
  digitalWrite(rightMotor10, LOW);
  digitalWrite(rightMotor15, LOW);
}

//---------------------------------------------------------

void lookRight()
{
  servo.write(180);
  delay(2000);
}

//---------------------------------------------------------

void lookLeft()
{
 servo.write(0);
 delay(2000);
}

//---------------------------------------------------------

void lookForward()
{
 servo.write(90);
}