Running functions at the same time

How do I make the turtle run functions a and b run separately?
I want it to place the lamp and if I restart the turtle to make it mine the lamp even if it didn't place it in that session.

function a()
  while true do
	os.pullEvent("redstone")
	if rs.getInput("back") == true
	  then
		turtle.digUp()
		turtle.up()
		turtle.select(1)
		turtle.placeUp()
		turtle.down()
		turtle.select(2)
		turtle.placeUp()
end
end
end
function b()
	while true do
	os.pullEvent("redstone")
	if rs.getInput("front") == true
	  then
		turtle.select(2)
		turtle.digUp()
		turtle.up()
		turtle.select(1)
		turtle.digUp()
		turtle.down()
		turtle.select(2)
		turtle.placeUp()
		turtle.select(1)
end
end
end
while true do
a()
b()
end

You can use parallel to make them run "at the same time", but that is a very bad idea with more than one turtle-movement function, as both functions could be in the process of performing the turtle actions (as they yield internally), this causing the instructions to interlace.

This thread appears to have a very misleading title… You could probably just check for the lamp prior to the while true do loop, using turtle.detect or turtle.compare.

You don't need two function in parallel, you only need one os.pullEvent
Here how it should look like.

while true do
  os.pullEvent("redstone")
  if rs.getInput("back") then
    turtle.digUp()
    turtle.up()
    turtle.select(1)
    turtle.placeUp()
    turtle.down()
    turtle.select(2)
    turtle.placeUp()
  elseif rs.getInput("front") then
    turtle.select(2)
    turtle.digUp()
    turtle.up()
    turtle.select(1)
    turtle.digUp()
    turtle.down()
    turtle.select(2)
    turtle.placeUp()
    turtle.select(1)
  end
end

CometWolf, on 14 May 2014 - 08:39 PM said:

This thread appears to have a very misleading title… You could probably just check for the lamp prior to the while true do loop, using turtle.detect or turtle.compare.

The lamp is above ground, while the turtle is underground.If it checks for a block above it will detect the ground.

Anavrins, on 14 May 2014 - 09:03 PM said:

You don't need two function in parallel, you only need one os.pullEvent
Here how it should look like.

while true do
  os.pullEvent("redstone")
  if rs.getInput("back") then
	turtle.digUp()
	turtle.up()
	turtle.select(1)
	turtle.placeUp()
	turtle.down()
	turtle.select(2)
	turtle.placeUp()
  elseif rs.getInput("front") then
	turtle.select(2)
	turtle.digUp()
	turtle.up()
	turtle.select(1)
	turtle.digUp()
	turtle.down()
	turtle.select(2)
	turtle.placeUp()
	turtle.select(1)
  end
end

You sir, are a genius!Thanks!It works like I intended it to work.
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