int ledm = 13; //buat variabel led merah dengan nilai 13
int btnm = 10; //buat variabel button dengan nilai 10
int btnstatusm=0; //buat variabel status button dengan nilai

void setup() {
// put your setup code here, to run once:
pinMode (ledm,OUTPUT);
pinMode (btnm,INPUT);
}
void loop() {
btnstatusm = digitalRead(btnm);
// put your main code here, to run repeatedly:
if(btnstatusm==HIGH) { //jika button ditekan
digitalWrite(ledm, HIGH); //maka led merah menyala
}else{                   // selain itu
digitalWrite(ledm, LOW); //led merah mati
}
}