Redstone Timer

-- Easy redstone timer for minecraft used with a computer.

-- String Input
term.clear() term.setCursorPos(1,1)
textutils.slowPrint("Input at what side you want to emit the redstone signal:")
a = read()

-- functions
function left()
  while true do
    redstone.setOutput("left", true)
    sleep(1)
    redstone.setOutput("left", false)
    sleep(1)
  end
end

function right()
  while true do
    redstone.setOutput("right", true)
    sleep(1)
    redstone.setOutput("right", false)
    sleep(1)
  end
end

function top()
  while true do
    redstone.setOutput("top", true)
    sleep(1)
    redstone.setOutput("top", false)
    sleep(1)
  end
end

function bottom()
  while true do
    redstone.setOutput("bottom", true)
    sleep(1)
    redstone.setOutput("bottom", false)
    sleep(1)
  end
end

function back()
  while true do
    redstone.setOutput("back", true)
    sleep(1)
    redstone.setOutput("back", false)
    sleep(1)
  end
end

-- main program
if a == "left" then
  term.clear()
  term.setCursorPos(1,1)
  textutils.slowPrint("Emiting redstone signal at left side!")
  left()
else if a == "right" then
  term.clear()
  term.setCursorPos(1,1)
  textutils.slowPrint("Emiting redstone signal at right side!")
  right()
else if a == "top" then
  term.clear()
  term.setCursorPos(1,1)
  textutils.slowPrint("Emiting redstone signal at top side!")
  top()
else if a == "bottom" then
  term.clear()
  term.setCursorPos(1,1)
  textutils.slowPrint("Emiting redstone signal at bottom side!")
  bottom()
else if a == "back" then
  term.clear()
  term.setCursorPos(1,1)
  textutils.slowPrint("Emiting redstone signal at the back of the computer!")
  back()
else
  textutils.slowPrint("That isn't a valid side!")
end
end
end
end
end