int sw = 12;
int led = 13;
int led_status = 0;
void setup() {
pinMode(sw, INPUT_PULLUP);
pinMode(led, OUTPUT);
}
void loop() {
if(digitalRead(sw)==0){
if(led_status==0){
digitalWrite(led,1);
led_status =1;
}else{
digitalWrite(led,0);
led_status = 0;
}
delay(250);
}
}