[CL-15] Styling of marks factory Tutorial v1

[vinay1668]

I added the some styling to the Marks factory Tutorial mark made by @loredanacirstea .
This one is my favorite cause I styled everything.(I didn't even compromised once, In other marks I had difficulty in styling)

[vinay1668]

https://marks.provable.dev/?ipfs=QmQQWRYwuzJdShfJq6qRi4CbjhuaxTggd1q9mEc8hTbe7G&input=%7B%22answer%22%3A%22Cannot%20read%20property%20%27num%27%20of%20null%22%2C%22number_a%22%3A%22Cannot%20read%20property%20%27-1%27%20of%20null%22%2C%22number_b%22%3A%22Cannot%20read%20property%20%27-1%27%20of%20null%22%2C%22number_c%22%3A%22Cannot%20read%20property%20%27-1%27%20of%20null%22%7D

[loredanacirstea]

Once the new style system & editor reaches the first usable version, if you extract these styles in a file that can be used with any mark, I will award at least 120 CL.