Bluetooth Multi-Function Car Kit Intelligent Car for Arduino

the code and the Installation manual for the Bluetooth Multi-Function Car Kit Intelligent Car for Arduino
for more details:
 http://www.icstation.com/product_info.php?products_id=2529

//There are more information aboat this code in Page 9 of "Instruction manual-English.pdf"
int pinI1=8;//define IN1
int pinI2=9;//define IN2
int speedpin=11;//define EA(PWM)
int pinI3=6;//define IN3
int pinI4=7;//define IN4
int speedpin1=10;//define EB(PWM)
void setup()
{
  pinMode(pinI1,OUTPUT);
  pinMode(pinI2,OUTPUT);
  pinMode(speedpin,OUTPUT);
  pinMode(pinI3,OUTPUT);
  pinMode(pinI4,OUTPUT);
  pinMode(speedpin1,OUTPUT);
}
void loop()
{
 //go straight
     analogWrite(speedpin,100);//input analog value to set speed
     analogWrite(speedpin1,100);
     digitalWrite(pinI4,LOW);//right motor move in anticlockwise
     digitalWrite(pinI3,HIGH);
     digitalWrite(pinI1,LOW);//left motor move in clockwise
     digitalWrite(pinI2,HIGH);
     delay(2000);
 //go back
     analogWrite(speedpin,100);//input analog value to set speed
     analogWrite(speedpin1,100);
     digitalWrite(pinI4,HIGH);//right motor move in clockwise
     digitalWrite(pinI3,LOW);
     digitalWrite(pinI1,HIGH);//left motor move in anticlockwise
     digitalWrite(pinI2,LOW);
     delay(2000);
 //turn left
     analogWrite(speedpin,60);//input analog value to set speed
     analogWrite(speedpin1,60);
     digitalWrite(pinI4,LOW);//right motor in anticlockwise
     digitalWrite(pinI3,HIGH);
     digitalWrite(pinI1,HIGH);//left motor in anticlockwise
     digitalWrite(pinI2,LOW);
     delay(2000);
 //turn right
     analogWrite(speedpin,60);//input analog value to set speed
     analogWrite(speedpin1,60);
     digitalWrite(pinI4,HIGH);//right motor in clockwise
     digitalWrite(pinI3,LOW);
     digitalWrite(pinI1,LOW);//left motor in anticlockwise
     digitalWrite(pinI2,HIGH);
     delay(2000);
 //stop
     digitalWrite(pinI4,HIGH);//right motor stop
     digitalWrite(pinI3,HIGH);
     digitalWrite(pinI1,HIGH);//left motor stop
     digitalWrite(pinI2,HIGH);
     delay(2000);
 }