int LEDState=0;
int LEDPin=6;
int buttonPin=7;
int buttonNew;
int buttonOld=1;
int dt=100;

void setup() {
  // put your setup code here, to run once:
pinMode(LEDPin, OUTPUT);
pinMode(buttonPin, INPUT);

}

void loop() {
buttonNew=digitalRead(buttonPin);
if(buttonOld==0 && buttonNew==1){
  if (LEDState==0){
    digitalWrite(LEDPin,HIGH);
    LEDState=1;
  }
  else{
    digitalWrite(LEDPin, LOW);
    LEDState=0;
  }
}
buttonOld=buttonNew;
delay(dt);
}