#!/bin/sh

clear
export COLS=$(tput cols)
export ROWS=$(tput lines)

while(true)
do
  XPOS=$(( $RANDOM % $COLS ))
  YPOS=$(( $RANDOM % $ROWS ))
  CHAR=$(( $(( $RANDOM % 126 )) + 33 ))
  tput cup $YPOS $XPOS 
  export NCHAR=$(printf "%o" $CHAR)
  echo -n -e "\\$NCHAR"
done