int b1pin = 17;
int b2pin = 16;
int b1val; void setup() {
Serial.begin(115200);
pinMode(b1pin, INPUT);
pinMode(b2pin, OUTPUT);
}

void loop() {
b1val = digitalRead(b1pin);
Serial.print("Push button value is ");
Serial.println(b1val);
if (b1val == 1) 
{
digitalWrite(b2pin, HIGH);
}
else {
digitalWrite(b2pin, LOW);  
}
}