Attempting to make a random choice in Lua - function

Question

This is what I have so far, but it seems that everytime I attempt to run it, it closes.
function wait(seconds)
local start = os.time()
repeat until os.time() > start + seconds
end
function random(chance)
if math.random() <= chance then
print ("yes")
elseif math.random() > chance then
print ("no")
end
random(0.5)
wait(5)
end
That is the full context.

Answer 1

Theres a few problems with that code, the first (as Lorenzo Donati points out) is that you've wrapped the actual invocations inside of random(), giving you a chunk that never actually does anything (woops).
The second is that you are invoking math.random() twice, giving you two separate values; this means that its perfectly possible for neither test to be true.
The third is minor: You are making two tests for an either-or choice; the first test would tell us everything we need to know:
function wait(seconds)
local start = os.time()
repeat until os.time() > start + seconds
end
function random(chance)
local r = math.random()
if r <= chance then
print ("yes")
else
print ("no")
end
end
random(0.5)
wait(5)
and just for kicks, we can replace the if-block with a conditional value, thus:
function wait(seconds)
local start = os.time()
repeat until os.time() > start + seconds
end
function random(chance)
local r = math.random()
print(r<=chance and "yes" or "no")
end
random(0.5)
wait(5)

Answer 2

Probably you meant to write this:
function wait(seconds)
local start = os.time()
repeat until os.time() > start + seconds
end
function random(chance)
if math.random() <= chance then
print ("yes")
elseif math.random() > chance then
print ("no")
end
end
random(0.5)
wait(5)