Makey Makey on Leonardo - Rapid fire keystrokes

[mrtunes]

yes a circuit would help.

and correct I made a mistake, I am confused about these four if statements

 if (output1 < 600 ) {   // you can change this parameter to fine tune the sensitivity
    if (!check){         
      Keyboard.print("d");         
      Serial.println(output1); 
      check = !check;   
    }         
  }

  if (output1 > 300) {     
    if (check){   
      check = !check;   
    }     
  }