int seisund;
int sees=0; //0-väljas, 1-sees
int eelmine=LOW;

void setup(){
  pinMode(13, OUTPUT);
  pinMode(7, INPUT);
}

void loop(){
 seisund=digitalRead(7);
 if((seisund==HIGH) && (eelmine==LOW)){
    sees=1-sees;
    delay(100);
 }
 eelmine=seisund;
 
 
 if(sees==0){
    digitalWrite(13, LOW);
 } else {
    digitalWrite(13, HIGH);
 }
}