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2.Bulbs matrix. Put bulbs together to make a matrix of bulbs. It can produce gradual fade-in and fade-out effect as a whole, or generate particular signs when you touch some buttons and switches. I also consider it will be good if the bulbs matrix connects with drums so that when you hit a key, the matrix can display some signs.
[[Image:Midterm Project Ning1.jpg|thumb|none|600px|alt=Midterm Project|It's a front view of my project.]]