Create javascript plugin

Develop js plugin for html5 player. The player: [login to view URL] We need a plugin based on the existing plug-ins "looping" and "slow play" The meaning of the plug-looping: Scrolling the same fragment, length of the scroll is tied with subtitles that are currently displayed on the screen. The value may be selected from one to seven. Example here:[login to view URL]%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE// control keys on the bottom bar. So the logic is to make an interesting feature, rather the set of functions: "looping", "slow" and create an animation. How it will work: As in the case of "looping", the user activates the function selects a value, eg from 5 to 15, for example, he chose 10. So: for every 10 subtitle this function activated, re-scrolling the same subtitle, but at the same time, greatly slowing down the playback and animation including subtitles. Animation is this: when simultaneous translation subtitles are illuminated simultaneously the speaker's words, where something I've seen in one player, or another example of how karaoke; highlights the words you want to sing. But then it will be more likely for demonstration purposes, just need to select the right speed for setting up and in 90% of cases will be highlighted correctly. Development time: 3 days. Waiting for your offer, thanks.