I am writing a zsh script to display ascii art in different colors.

Basically I have ascii text written in block letters and I want to write a script that randomizes the colors of each one using color escaped characters.

The text is like this

I want to make a script that:

1. Creates an array of six random colors

2. Randomizes the order of the colors

3. You’ll notice in the ascii there are number characters before each letter e.g. 1 is before ‘B’, 2 is before ‘E’.
   I want to replace each one with a color so that each ‘letter’ of the ascii art is a different color.

4. This is my attempt on the code so far and it’s not working:

# Define array of colors
colors=("[31m" "[32m" "[33m" "[34m" "[35m" "[36m")

# Randomize the order of colors in the array
colors=($(printf "%sn" "${colors[@]}" | shuf))

# Read ASCII art from file or source
ascii_art=$(<ascii_art.txt)

# Function to replace number characters with colors
replace_numbers_with_colors() {
    local text="$1"
    local result=""
    local index=0
    for ((i = 0; i < ${#text}; i++)); do
        local char="${text:i:1}"
        if [[ $char =~ [0-9] ]]; then
            result="${result}${colors[index]}$char[0m"
            ((index++))
        else
            result="${result}$char"
        fi
    done
    echo "$result"
}

# Replace numbers with colors in ASCII art
colored_ascii_art=$(replace_numbers_with_colors "$ascii_art")

# Print the colored ASCII art
echo -e "$colored_ascii_art"```

So far it only colors one letter and doesn't delete the numbers.
[The output looks like this](https://imgur.com/a/OFiQqvq)

and only the first letter of the first line is colored.

Please let me know how to approach this.

I also thought keeping the text in six different elements of an array, then I could iterate through it two dimensionally; by array element and by line number