arduino rescue bot

hello i am trying to make a robot that recocnises objects and walls by combining two ultrasonic sensors but i cant get it to work plis help me
#include <Servo.h> //includes the servo library
#include <NewPing.h>
int motor_pin1 = 4;
int motor_pin2 = 5;
int motor_pin3 = 6;
int motor_pin4 = 7;
int servopin = 8;
int sensorpin = 0;
int leftdist = 0;
int rightdist = 0;
int object = 5; //distance at which the robot should look for another route
NewPing sonar1(11, 12, 200); // Sensor 1: trigger pin, echo pin, maximum distance in cm
NewPing sonar2(9, 10, 200);
Servo myservo;
#define pingSpeed 1000 // Ping frequency (in milliseconds), fastest we should ping is about 35ms per sensor
unsigned long pingTimer1, pingTimer2;
int in1, in2;

void setup ()
{
pingTimer1 = millis() + pingSpeed; // Sensor 1 fires after 1 second (pingSpeed)
pingTimer2 = pingTimer1 + 35; // Sensor 2 fires 35ms later
pinMode(motor_pin1,OUTPUT);
pinMode(motor_pin2,OUTPUT);
pinMode(motor_pin3,OUTPUT);
pinMode(motor_pin4,OUTPUT);
myservo.attach(servopin);
myservo.write(90);
delay(700);
}
void loop(){
{if (millis() >= pingTimer1) {
pingTimer1 += pingSpeed; // Make sensor 1 fire again 1 second later (pingSpeed)
in1 = sonar1.ping_in();
}
if (millis() >= pingTimer2) {
pingTimer2 = pingTimer1 + 35; // Make sensor 2 fire again 35ms after sensor 1 fires
in2 = sonar2.ping_in();}}

if (in2 < object) && (in1 < object)
{ forward();
}
if (in2 > object) && (in1 > object){
findroute();
}
//if (in2 < object) && (in1 > object)
//grap():
}

void forward() { // use combination which works for you
digitalWrite(motor_pin1,HIGH);
digitalWrite(motor_pin2,LOW);
digitalWrite(motor_pin3,HIGH);
digitalWrite(motor_pin4,LOW);
return;
}

void findroute() {
halt(); // stop
backward(); //go backwards
lookleft(); //go to subroutine lookleft
lookright(); //go to subroutine lookright

if ( leftdist < rightdist )
{
turnleft();
}
else
{
turnright ();
}
}

void backward() {
digitalWrite(motor_pin1,LOW);
digitalWrite(motor_pin2,HIGH);
digitalWrite(motor_pin3,LOW);
digitalWrite(motor_pin4,HIGH);
delay(500);
halt();
return;
}

void halt () {
digitalWrite(motor_pin1,LOW);
digitalWrite(motor_pin2,LOW);
digitalWrite(motor_pin3,LOW);
digitalWrite(motor_pin4,LOW);
delay(500); //wait after stopping
return;
}

void lookleft() {
myservo.write(150);
delay(700); //wait for the servo to get there
leftdist= in2();
myservo.write(90);
delay(700); //wait for the servo to get there
return;
}

void lookright () {
myservo.write(30);
delay(700); //wait for the servo to get there
rightdist = in2();
myservo.write(90);
delay(700); //wait for the servo to get there
return;
}

void turnleft () {
digitalWrite(motor_pin1,HIGH); //use the combination which works for you
digitalWrite(motor_pin2,LOW); //right motor rotates forward and left motor backward
digitalWrite(motor_pin3,LOW);
digitalWrite(motor_pin4,HIGH);
delay(1000); // wait for the robot to make the turn
halt();
return;
}

void turnright () {
digitalWrite(motor_pin1,LOW); //use the combination which works for you
digitalWrite(motor_pin2,HIGH); //left motor rotates forward and right motor backward
digitalWrite(motor_pin3,HIGH);
digitalWrite(motor_pin4,LOW);
delay(1000); // wait for the robot to make the turn
halt();
return;
}
void

Start here