Linear Magnetic Hall sensor

Use linear magnetic Holzer module and digital interface 13 with LED to build a simple circuit, making a magnetic field indicating light.
Make use of the LED built in digital interface 13 to connect the linear Holzer magnetic sensor to digital interface 3. When linear magnetic Holzer sensor senses a button signal, the LED is on; otherwise, it will be off.

Sample Code:
Int Led=13; / / define LED interface
Int buttonpin=3; / / define the interface of linear magnetic Holzer sensor
Int Val; / / define digital variable val

Setup void (){
PinMode (Led, OUTPUT); / / LED was defined as the output interface
PinMode (buttonpin, INPUT); / / define linear magnetic Holzer sensor as output interface
}

Loop void (){
Val=digitalRead (buttonpin); / / read the value of digital interface 3 and assign it to val
If (val==HIGH) / / when the linear magnetic Holzer sensor detect a signal, LED is flashing{
DigitalWrite (Led, HIGH);
}Else{
DigitalWrite (Led, LOW);
}