int ledpin =7;
int bottom = 10;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledpin,OUTPUT);
  pinMode(bottom,INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(bottom) == HIGH){
    digitalWrite(ledpin,HIGH);
  }else{
    digitalWrite(ledpin,LOW);
  }
}