Timer Switch for Water Pump

1int Relay = 12;
2int BUTTON = 4;
3
4void setup(){
5pinMode(Relay,OUTPUT);
6pinMode(BUTTON,INPUT);
7}
8
9void  loop()
10{
11if(digitalRead(BUTTON) == HIGH)
12{
13digitalWrite(Relay,HIGH);
14delay(30000);
15}
16else
17{
18digitalWrite(Relay,LOW);
19}
20}