 import SwiftGPIOLibrary
 
 enum Command: Int {
-case one
-case two
-case blink
-case button
+case One
+case Two
+case Blink
+case Button
 }
 
 guard CommandLine.arguments.count == 2 else {

  // Setup pin 18 as input
  let button = setupIN(ports: [.P18], for: .RaspberryPi2)[.P18]

  switch(led) {
  case .one:
    print("one")
    gpios[.P20]?.value = 1

  case .button:
    print("button")
    var counter = 0
    while counter < 10 {
      guard let value = button?.value else { return }
      if value == 0 {
        counter += 1
