create simple layout and fill random colors

[satyam-seth]

Steps -

• simple git clone

git clone git@github.com:fellow-developers/css_exercise.git

cd css_exercise

code .

• create your own branch

git checkout -b task3

• add local changes

git add .

• commit local changes

git commit -m "leave your comment"

• push your change to remote

git push origin task3

• Click the below link to create a pull request
  to create a pull request you have to visit the repository page

• request the @satyam-seth to review the code

Output -