outputs an exclamation point in the center of the terminal

exclaim.ex

# clear the screen
IO.write("\e[3;J\e[H\e[2J")

# get the height and width
h = elem(Integer.parse(elem(System.cmd("tput", ["lines"]),0)),0)
w = elem(Integer.parse(elem(System.cmd("tput", ["cols"]),0)),0)

# get the center of the screen
xmid = round(w/2)
ymid = round(h/2)

# display ! in middle
IO.write("\e[#{ymid};#{xmid}H!")

# move cursor to bottom right
IO.write("\e[#{h};#{w}H")
IO.gets ""