A Linux Tree from ForLinux

Here is a script that, when executed, will draw a Christmas tree using the characters chosen by the user on the linux terminal.

The script will prompt the user to enter the character using which the tree has to be drawn. Then it will prompt the user to enter two characters that will be used to decorate the tree. The last input it will ask for is the character using which the base of the tree has to be drawn.

#!/bin/bash 
 
trapi() {
 
cols=`tput cols`
start=$((cols/2))
# char="*"
char="$3"
rows=$1
rows=$((rows+5))
# tput clear
for((i=$1;i<$rows;i++))
do 
 
deco1=$(($RANDOM % rows))
deco2=$((RANDOM % rows))
cols=$((start-i-$2))
tput cup $i $cols
 
#printf "$char" 
for((j=0;j<=(i+$2);j++))
do
 
if [ $i -eq $((rows-1)) ]
then
printf "$char "
 
elif [ $j -eq 0 ]
then
        printf "$char "
else
 
        if [ $j -eq $((i+$2)) ]
        then
                printf "$char "
        else
                if [ $j -eq $deco1 ]
                then
                printf "$4 "
                elif [ $j -eq  $deco2 ]
                then 
                printf "$5 "
                else
                printf "  "
                fi
        fi 
 
fi
 
done
done
echo""
} 
 
triangle() {
cols=`tput cols`
start=$((cols/2))
#echo "How many rows do you want"
#read rows
#echo "What character do you want to use"
#read char
 
rows=5
# char="*"
char="$1"
 
tput clear
for((i=0;i<rows;i++))
do 
cols=$((start-i))
tput cup $i $cols
deco=$(($RANDOM%rows))
#printf "$char" 
for((j=0;j<=i;j++))
do
 
if [ $i -eq $((rows-1)) ]
then
printf "$char "
 
elif [ $j -eq 0 ]
then
        printf "$char "
else
 
        if [ $j -eq $i ]
        then
                printf "$char "
        else
                if [ $j -eq $deco ]
                then 
                printf "$2 "
                else
                printf "  "
                fi
        fi 
 
fi
 
done
done
echo""
# sleep 5 
}
 
 
base() {
 
cols=`tput cols`
start=$((cols/2))
#char="*"
rows=5
char="$2"
 
# tput clear
for((i=0;i<5;i++))
do 
cols=$((start-i-2))
tput cup $(($1+i)) $cols
 
#printf "$char" 
for((j=0;j<=(i+2);j++))
do
 
if [ $i -eq $((rows-1)) ]
then
printf "$char "
 
elif [ $j -eq 0 ]
then
        printf "$char "
else
 
        if [ $j -eq $((i+2)) ]
        then
                printf "$char "
        else
        printf "  "
        fi 
 
fi
 
done
done
echo""
} 
 
echo "Enter character for the tree" 
read char 
echo "Enter first decoration character"
read ch_deco1
echo "Enter second decoration character"
read ch_deco2 
echo "Enter character for base" 
read base_char
triangle "$char" "$ch_deco1"
trapi 5 1 "$char" "$ch_deco1" "$ch_deco2"
trapi 10 2 "$char" "$ch_deco1" "$ch_deco2"
trapi 15 3 "$char" "$ch_deco1" "$ch_deco2"
base 20 "$base_char"

Save the script as tree.sh and allow it to be executable

$ chmod +x chritstmas_tree.sh

Execute the script

$ ./chritstmas_tree.sh 
Enter character for the tree
*
Enter first decoration character
o
Enter second decoration character
!
Enter character for base
^

Have a very merry Christmas and a happy new year from all of us her at Forlinux.

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