Artist's name: Sami Korkiakoski
He has 16.7k followers on Instagram
He is one of the line painting artists from Finland. He drew on paper that was very wide and pressed on the wall because it really needed a place to rest for the size of his painting.
like a painting measuring 180x160 cm in the form of a colorful line painted by him because indeed this is how the paintings belong to him.
Source: https://www.instagram.com/p/BozTYdkgNJe/
See other artwork here: https://www.instagram.com/samikorkiakoskiartist/