Print Turtle Inventory As Square Table

function dispInvAsTbl(monitor,x,y) --Displays the inventory of the turtle as a 4 x 4 table relative to the x and y coordinates specified.
    local c = 1
    while( c < 17) do
        monitor.setCursorPos((c - (4 * (math.ceil(c/4) - 1))) * 3 + x - 3, math.ceil(c/4) + y - 1)
        monitor.write(string.sub(turtle.getItemCount(c), -2))
        monitor.setCursorPos((c - (4 * (math.ceil(c/4) - 1))) * 3 + x - 1, math.ceil(c/4) + y - 1)
        if((c - (4 * (math.ceil(c/4) - 1))) ~= 4 ) then
            monitor.write("|")
        end
        c = c + 1
    end
end

mon = peripheral.wrap("left")
mon.clear()

local x = read()
local y = read()
dispInvAsTbl(mon,x,y)