Letter: Uppercase Sigma
Work Tool: Adobe Illustrator
First (Symbol type / Text type / Display type)
Basic layout for 3 different form were good but, It looks so simple. Thus, I decided to decorate it.
Final (Symbol type / Text type / Display type)
I added some decorations for each from. I added some lines and limited colors for symbol type and text type. Honestly, I have no idea for display type, so I just added various rectangles with colours, however, it still looks messy.
Final edit (Display type)
Finally, I painted it using only few colors and changed layout with some strokes.