Online Touch Typing Tutor

Hi, I want to make a touch typing (10 fingers writing) exercise website. which would look like something like this : [login to view URL] there will be a generic text (which i should be able to change) in a textbox. In another textbox user will enter the text and the while the user enters the correct words the color of the words in the sentence turn to red. If the user writes the word wrong the color of the word in the original text box will return red. Please contact me if you have any questions. This is a very easy job if you have good javascript skills. To be more fast and accurate i will pay after I see a working demo. my budget is 100 USD max. Regards.