Change the page's background color to blue, green and yellow colors and you can click a block to make it changing color. Change a webpage's background color to blue, green and yellow colors to protect your eyes from the intensity of light colors. We hope you enjoy our products as much as we enjoy offering them to you. If you have any questions or comments, please don’t hesitate to contact us. Social Accounts: https://www.facebook.com/GreenCitizen https://twitter.com/greencitizenus