the code above could be simpler
int value = analogRead(A0);
if (800 < value)
Serial.println("Button1");
else if (750 < value)
Serial.println("Button2");
else if (650 < value)
Serial.println("Button3");
else if (480 < value)
Serial.println("Button4");
else
Serial.println("Button5");
delay (50);