what is wrong with this

hey guys wrote following code ,

code: [select]

#include "wire.h"
#include "i2cdev.h"
#include "mpu6050.h"
#define sen_input 10
#define led_alert 12


mpu6050 mpu;

int16_t ax, ay, az;
int16_t gx, gy, gz;



int valx;
int prevvalx;
int valy;
int prevvaly;

void setup()
{

  serial.begin(9600);
  pinmode(sen_input, input);
  pinmode(led_alert, output);
 
  serial.println("initialize mpu");
  mpu.initialize();
  serial.println(mpu.testconnection() ? "connected" : "connection failed");
  serial.println('at+cmgf=1');

}

void loop()
{
  mpu.getmotion6(&ax, &ay, &az, &gx, &gy, &gz);
  prevvalx = valx;
  valx = map(ax, 17000, -17000, 0, 179);
  if ( prevvalx >= 100)
  {

    serial.println("at");
    delay(1000);
    serial.println("at+cmgf=1"); // send sms in text mode
    delay(1000);
    serial.println("at+cmgs=\"+91925252871180166\""); //change number , you'd receive message
    delay(1000);
    serial.print(" (attention required)"); // content of message
    serial.write(26); // ctrl+z ascii code
    delay(3);
  }
  prevvaly = valy;
  valy = map(ay, -17000, 17000, 0, 179);
  if ( prevvaly >= 100)
  {

    digitalwrite(led_alert,high);
    serial.println("at");
    delay(1000);
    serial.println("at+cmgf=1"); // send sms in text mode
    delay(1000);
    serial.println("at+cmgs=\"+9198752521180166\""); //change number , you'd receive message
    delay(1000);
    serial.print(" (attention required)"); // content of message
    serial.write(26); // ctrl+z ascii code
    delay(30);

  }
 
    int thief;
    while(1)
    {
      thief=digitalread(sen_input);
      if(thief)
      {
        digitalwrite(led_alert,high);
        serial.println("at");
        delay(1000);
        serial.println("at+cmgf=1"); // send sms in text mode
        delay(1000);
        serial.println("at+cmgs=\"+919871180166\""); //change number , you'd receive message
        delay(1000);
        serial.print(" (attention required)"); // content of message
        serial.write(26); // ctrl+z ascii code
        delay(30);


        delay(1);
      }
     

      }
    }
 



this code takes reading last loop (pin 10) , ignores first 2 should thnks in advance

code: [select]


while(1)


within microseconds of sketch starting, it's going while(1) loop , stay there until reset it.  if first 2 conditions not met on first reading (and won't be), never looked @ again.

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