int led = 6;
int sw1 = 2;
int sw2 = 3;
int sw3 = 4;


void setup() {
pinMode(led, OUTPUT);
pinMode(sw1, INPUT);
pinMode(sw2, INPUT);
pinMode(sw3, INPUT);
}

void loop() {

if(digitalRead (sw1) == HIGH)
{
digitalWrite(led, HIGH);
delay(500);
}

if( digitalRead (sw2) == HIGH)
{
digitalWrite(led, LOW);
delay(500);
}

if( digitalRead (sw3) == HIGH)
{
digitalWrite(led, HIGH);
delay(5000);
digitalWrite(led, LOW);
}
}