Pi Calculator

term.redirect(term.native())
itemX, itemY = term.getCursorPos()
pi = 3
a = 2
b = 3
c = 4
function addThem(number)
    a = a + number
    b = b + number
    c = c + number
end
while true do
    pi = pi + 4/(a*b*c)
    addThem(2)
    pi = pi - 4/(a*b*c)
    addThem(2)
    term.setCursorPos(itemX,itemY)
    write(pi)
    if a % 4 == 0 then sleep(0) end
end