int led = 2;
int knopke = 4;


void setup() {
 
 pinMode(led, OUTPUT);
pinMode(knopke, INPUT); //INPUT ivedame duomenis 
}

void loop() {
 bool arpaspaustas = digitalRead(knopke);
  if (arpaspaustas ==true) //patikrinma ar mygtukas paspaustas
{
digitalWrite(led, HIGH);
}
else
{
digitalWrite(led, LOW);
}
delay(50);



}