Rotate / spin an image and turn into am mp4 video

rotate-inc.sh

#!/bin/bash
# Create variable NUM starting at 0
NUM=0
# Create the directory images-spin if it does not exist
[ -d images-spin ] || mkdir images-spin
# Renove any *.png images that may exist in the directory
rm images-spin/*.png
# Create a loop of 360 ( $i for each degree of a circle ) 
for i in {1..360}; do
	# if $i divided by input variable $1 equals 0 ( no remainer )
    if (( $i%$1==0 )); then
    # NUM = NUM + 1	
    NUM=$((NUM+1))
    # Below is for debug
    #sleep 1
    #echo Degrees $i, images-spin/$NUM-.png
    # Create and image rotated by $i degrees   save as NUM-.png
    ffmpeg -hide_banner -i spin.png -vf "rotate="$i"*PI/180" images-spin/$NUM-.png
    # Resize the NUM-.png created to 720:720 save as NUM.png
    ffmpeg -hide_banner -i images-spin/$NUM-.png -vf scale=720:720 images-spin/$NUM.png   
    fi ; 
done

#Convert the $NUM.png images to a video
ffmpeg -hide_banner -framerate 30 -i images-spin/%0d.png -vf scale=720x720 \
-c:v libx264 -r 30 -pix_fmt yuv420p -y "IMAGES-spin"$1".mp4"

#remove any existing mylist.txt
rm mylist.txt
# Create a mylist.txt to concat into a longer video 
LIST="IMAGES-spin"$1".mp4"
echo $LIST
echo "file '$LIST'" >>mylist.txt
echo "file '$LIST'" >>mylist.txt
echo "file '$LIST'" >>mylist.txt
echo "file '$LIST'" >>mylist.txt
echo "file '$LIST'" >>mylist.txt
echo "file '$LIST'" >>mylist.txt
echo "file '$LIST'" >>mylist.txt
echo "file '$LIST'" >>mylist.txt

# Concat (join) all the file in mylist.txt into a file called long.mp4
ffmpeg -f concat -i mylist.txt -c copy long.mp4

# play long.mp4 with vlc player
vlc long.mp4