D-8
LAB-2

v-1.0
---
1. setup

    ==> done
D-8
LAB-2

v-1.1
---
1. draw: A and B

    ==> done
D-8
LAB-2

v-1.2-1
---
1. click button: => draw B1'
		=> rotate to the right

    ==> done
D-8
LAB-2

v-1.2-2
---
1. click button: => draw B1'
		=> rotate to the left

    ==> done