pong.sh

#!/bin/bash

frames=(
"
                          _______ _______
                 0__o.   /______//______/|   @_o
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
"
                        . _______ _______
              o_ 0       /______//______/|   @_o
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
"
             o            ___.___ _______
              \_ 0       /______//______/|   @_o
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
"
             o            _______ _______
              \_ 0       /______//._____/|   @_o
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
"
             o            _______ _______
              \_ 0       /______//______/|   @_o
                /\_,    /______//___.__/     /\\
               |  \     |      ||      |     / |
"
"
             o            _______ _______
              \_ 0       /______//_____./|  o@
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
"
             o            _______ _______
              \_ 0       /______//______/|.o_@
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
"
             o            _______ ______.
              \_ 0       /______//______/|  o@
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
"
             o            _______ .______
              \_ 0       /______//______/|   @_o
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
"
             o            _______ _______
              \_ 0       /____._//______/|   @_o
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
"
                          _______ _______
              o_ 0       /______//______/|   @_o
                /\_,    /_.____//______/     /\\
               |  \     |      ||      |     / |
"
"
                          _______ _______
                 0_o   . /______//______/|   @_o
                /\_,    /______//______/     /\\
               |  \     |      ||      |     / |
"
)

display_help () {
  echo "Usage: $0 [<frame_number> | -C | --clear]"
  echo "This script displays an animated ASCII art of a ping pong rally."
  echo ""
  echo "Options:"
  echo "  <frame_number>    Display a specific animation frame. No clearing is done automatically."
  echo "  -C, --clear       Clear the previous 4 lines without displaying a frame."
  echo "  -h, --help        Show this help message."
}

if [[ $# -eq 0 ]]; then
  while true; do
    for frame in "${frames[@]}"; do
      clear
      echo "$frame"
      sleep 0.2
    done
  done
  exit 0
fi
clear_flag=false
frame_index=-1

# Parse arguments
for arg in "$@"; do
  if [[ $arg == "--clear" || $arg == "-C" ]]; then
    clear_flag=true
  elif [[ $arg =~ ^[0-9]+$ ]]; then
    frame_index=$((arg % ${#frames[@]}))
  elif [[ $arg == "-h" || $arg == "--help" ]]; then
    display_help
    exit 0
  else
    display_help
    exit 1
  fi
done

# Clear the previous frame if the --clear/-C flag is present
if $clear_flag; then
  echo -ne "\033[5A"  # Move the cursor up 5 lines
  echo -ne "\033[0J"  # Clear from the cursor to the end of the screen
fi

# Display the frame if a valid frame index was given
if [[ $frame_index -ge 0 ]]; then
  echo -ne "${frames[$frame_index]}"
fi