shadows movement

ive read about 160 chapters and ive been wondering for ages, when he sends the shadow ahead along the floor how does it look lie moving? is it image 1 or 2

https://preview.redd.it/g96ivcu2sj6g1.png?width=643&format=png&auto=webp&s=f3f399909be9ca8f8face4f5c77544f26be602a4

https://preview.redd.it/84wcj9l6sj6g1.png?width=604&format=png&auto=webp&s=b6f265dae5bd82ba3ea0a3b565b7644c7ddd7105