botAltar.lua

local slots
local t = turtle

if #arg > 1 then
    slots = arg[1]
else
    slots = 5
end

print('Running slots: '..slots.." (3-"..slots+2..")")

for i = 3 to slots do
    t.drop(1)
end

repeat
    print('Redstone: '..rs.getAnalogInput('front'))
    os.sleep(1)
until (rs.getAnalogInput('front') > 1)

t.up()
t.select(2)
t.drop(1)
t.down()
t.select(1)
t.place()