Confused? Then expected?

It's a weird problem with a program I am trying to create. I wouldn't call myself a noob at computercraft, I know the basics. I just don't see what's wrong. The error code is "Bios:206: [string "Startup"]:5: 'then' expected. The code goes like this:

term.clear()
term.setCursorPos(1,1)
write("Door Control Computer.")

if rs.Input("bottom", true) then
redpulse("right", 8)
sleep(3)
(I then repeat the redpulse and sleep 4 times and end the function)

I know what the error code is trying to tell me. I just don't see where i'm missing the then. Sorry for being a N008. Thanks for the help. Greatly appreciated! :)/>

I copied the code and tried it myself, I did not get a 'then' expected error, However I do notice a few things
1. I believe you want rs.getInput() not rs.Input() and it would not have the true, it would just be

rs.getInput("bottom")

2. You could use print instead of write so it goes to the next line (unless you plan to draw this to a monitor at some point)
3. Unless you have a function called redpulse(), it is not going to work, redpulse is a file in the computercraft rom, not a function
You could make it a function by adding this to your code (at a point before you call redpulse)

local function redpulse(side,count,speed)
if speed==nil then speed=0.25 end
for x=1,count do
rs.setOutput(side,true)
sleep(speed)
rs.setOutput(side,false)
sleep(speed)
end
end

Also since you say you do

redpulse("right", 8)
sleep(3)

4 more times you could put that in a loop

After all changes are made you code would work like this

local function redpulse(side,count,speed)
if speed==nil then speed=0.25 end
for x=1,count do
  rs.setOutput(side,true)
  sleep(speed)
  rs.setOutput(side,false)
  sleep(speed)
end
end

term.clear()
term.setCursorPos(1,1)
term.write("Door Control Computer.")

if rs.getInput("bottom") then

for x=1,5 do
  redpulse("right", 8)
  sleep(3)
end

end

Thank you. :)/>

I'm really sorry to have to bother you again but is there anyway I can make this pulse to different sides not just one? Thank you though the code works! :)/>

Edit: Worked it out, it's going to be a long process but I'll manage thanks! ;)/>

local function redpulse(side,count,speed)
if speed==nil then speed=0.25 end
if type(side)=="string" then
for x=1,count do
  rs.setOutput(side,true)
  sleep(speed)
  rs.setOutput(side,false)
  sleep(speed)
end
elseif type(side)=="table" then
for x=1,count do
  for _,s in pairs(side) do
   rs.setOutput(s,true)
  end
  sleep(speed)
  for _,s in pairs(side) do
   rs.setOutput(s,false)
  end
  sleep(speed)
end
end
end

The first parameter can be either a string side, ex: "left" or "top" or it can be a table, ex: {"left","right","top"}

When it is a table all the sides in the table will pulse at the same time.

Hello, back again. Thought I'd put this here rather than creating a new topic. So, i've made my program and it works except for one thing: when there is no Redstone pulse in the bottom it ends the program. I want to make it so if there isn't a Redstone pulse that it will keep restarting the program every few seconds. Any idea how I could do this?

You would put the check into a loop
Change this

if rs.getInput("bottom") then
  for x=1,5 do
	redpulse("right", 8)
	sleep(3)
  end
end

to this

while true do
  os.pullEvent("redstone") --Waits for the redstone input on any side to change
  if rs.getInput("bottom") then
	for x=1,5 do
	  redpulse("right", 8)
	  sleep(3)
	end
  end
end

Thanks!

Ok, i'm back again. This time the program just doesn't work and I don't know why. I haven't added in the code above yet and I tested it yesterday, it worked fine. Now it saying that eof is expected even though yesterday this didn't happen and i've made no changes since.

Edit: Fixed it!

Edit: The code you gave me doesn't work. I've spent 20 mins looking for the unexpected symbol error and I can't find it! The program ran and worked before I put this in.

EOF = End Of File. The Lua interpreter would expect the file to end if you put in and "end" statement somewhere that doesn't have a matching if/for/whatever statement above it. If you put more code after such an "end", then it realises you must've made a mistake, and so it errors out.

Thank you. I've corrected that but now it saying there is an unexpected symbol. I've looked where I put the new code in but I can't see it and it can't be one of the lines before this new code was put in because it worked fine then. Help!

Do to all the changes that have been made to it, could you please post the code as it is now?

I'm really sorry that I haven't been able to answer your reply properly. My internet's gone to @?£%%^&*R%$%&I* right now and I've encountered a problem with tekkit where all the blocks i've placed turn up invisible and the game acts as if they're not there. I'm waiting for a reply from the tekkit forum people thingys. Really sorry!