tree.sh

#!/bin/bash

# tput is a command to manipulate the terminal, it can be used to change the color of text, apply effects, and generally brighten things up.
trap "tput reset; tput cnorm; exit" 2
clear
tput civis
lin=2
col=$(($(tput cols) / 2))
c=$((col - 1))
est=$((c - 2))
color=0

# Set the text color to green to write the tree
tput setaf 2
tput bold

# Write the tree
for ((i = 1; i < 40; i += 2)); do
	tput cup $lin $col
	for ((j = 1; j <= i; j++)); do
		echo -n \*
	done
	let lin++
	let col--
done

## Set the color to brown for the trunk
tput sgr0
tput setaf 130

# Write the Trunk in three lines
for ((i = 1; i <= 3; i++)); do
	tput cup $((lin++)) $c
	echo 'mWm'
done

# Write a greeting
tput setaf 93
tput bold
tput cup $lin $((c - 15))
echo krsntn wishes you Merry Christmas
tput cup $((lin + 1)) $((c - 11))
echo And a Happy New Year 2024
let c++
k=1

# Configure lights and decorations
while true; do
	for ((i = 1; i <= 35; i++)); do
		# Turn off the lights
		[ $k -gt 1 ] && {
			tput setaf 2
			tput bold
			tput cup ${line[$((k - 1))$i]} ${column[$((k - 1))$i]}
			echo \*
			unset line[$((k - 1))$i]
			unset column[$((k - 1))$i] # Array cleanup
		}

		li=$((RANDOM % 9 + 10))
		start=$((c - li + 2))
		co=$((RANDOM % (li - 2) * 2 + 1 + start))
		tput setaf $color
		tput bold # Switch colors
		tput cup $li $co
		echo o
		line[$k$i]=$li
		column[$k$i]=$co
		color=$(((color + 1) % 8))
	done
	k=$((k % 2 + 1))
done