Interfacing Flex Sensor with Arduino

1#define blue 2
2#define green 3
3#define red 4
4unsigned int f;
5void  setup()
6{
7  pinMode(blue,OUTPUT);
8  pinMode(green,OUTPUT);
9  pinMode(red,OUTPUT);
10  Serial.begin(9600);
11}
12void loop()
13{
14  f=analogRead(1);
15  Serial.println(f);
16  if(f>300)                          //No Bend; Blue LED Glows
17    {
18      digitalWrite(blue,HIGH);
19      digitalWrite(green,LOW);
20      digitalWrite(red,LOW);
21    }
22  else  if((f<300)&&(f>260))          //Small Bend; Green LED Glows
23    {
24     digitalWrite(green,HIGH);
25     digitalWrite(blue,LOW);
26     digitalWrite(red,LOW);
27    }
28  else                              //  Larger Bend; RED LED Glows
29    {
30      digitalWrite(red,HIGH);
31      digitalWrite(green,LOW);
32      digitalWrite(blue,LOW);
33    }
34    delay(50);
35}
36