week 2 suptember 16

Lets introduce some basic knowledges :

• Flip-horizontal: a picture change from left to right 
  
• Flip-vertical: a picture change from top to bottom 
  
• above: this is hard to describe so I give you a example : 

>(Above ◆ ♠ ๑ )

  ◆

  ♠

 ๑

• beside:   

>(beside ◆ ♠ ๑ )

  ◆♠๑ 

• add:

>(+ 10 2)

  12

• minus:

>(- 10 2)

  8

• times:

>(* 1 2 3 4)

  24

Sorry I'm late to write earliest blog ^^