Create CSS easily
is a short term for Cascading Style Sheets. CSS is used to alter the display of the HTML coded environment. For example, using CSS can change the appearance of your scroll bar, the color, headings and fonts of your whole website. However, in order to use CSS codes, you should be able to understand both the environment of your website as well as HTML codes.
Understanding CSS can be very easy. W3 schools have posted an article about CSS and any beginner can understand the tutorial
There is a website that will provide you with many facilities in the creation of CSS files. It will even allow you to see and alter the changes before using the codes.