For most FYPs and FYTs, the introduction provides a high level view of what your project or thesis is about, and normally it includes three sections:
The above web pages tell all or most of what you need to know about writing a good introduction. Keep in mind that the proposal is only your initial attempt to define what you are doing. Your CT will help you refine it after you submit your proposal and progress report.
It is good to keep your audience in mind. Although the primary audience is your two readers, who will give you your grade, you may want to keep in mind secondary audiences: