Two paths diverge in the lectures 2 Think of the first as concepts, the second as capabilities This ClassPrinciplesDoing stuff

Today – they are merged 3

As experienced Lightbot hackers 4

Agent, Instructions, Intent 5

Sequencing 6

Instructions formed of simpler instructions 7 An Instruction abstracts those steps

Abstraction 8

9

Functions package computation 10

The function becomes a concept 11 Process stairs F1 Move to next staircase Process a stairs F1 Move to next staircase Process a stairs F1

A five instruction program 12 Is that beautiful, or what?

Here is what is beautiful … 13 To a programmer the instruction is monolithic (one thing) To an agent each instruction is a series of steps Slide 7 Slide 12 F1( ): Process Stairs F2( ): Move To Next Staircase It is one concept here (monolithic, but here it is a series of eight instructions

Abstraction … 14

Keep using abstraction … 15 It only simplifies our thinking; the bot still does all the work

Who is M.C. Escher? … 16

The function is just the packaging 18

Summary from Lightbot

What if … 20

Per Bot: Operation and Function 21 GreyBot.Left GreyBot.Jump GreyBot.Power BlueBot.Right BlueBot.Step

Per Bot: Operation and Function 22

Activity – programming w/ words

Example

Repeat operations

Step Jump Jump Step Left Power Step Power Step Power Step Jump Jump Step Left 3:(Power Step) SJJSL 3:(PS) Step Jump Jump Step Right 5:Step Power SJJSR 5:S P 7:(Step Power)R S R 7:(Power Step) 7:(SP)RSR 7:(PS)