Week 01 · Memory and the Missing Bug
Tuesday
The box remembers
// A memory box holds one number
⏱ about 15 min
The box remembers!
Rocket and Raven watch a test ship fly.
The auto-pilot reads a number from a box.
The number tells the ship how high to fly.
Raven has a big question.
Does the box forget its number?
Rocket says, let us test it and see.
WARM-UP: FILL AND PEEK
- Read the lines.
- Tap the answer.
set height to 6
?
set height to 1
say height
?
Use the box later
Line one puts 3 in the box.
Line two says fly up height.
Nova peeks in the box and finds 3.
So Nova flies up 3 spaces!
What do you notice?
The number is written only once.
The box keeps it for later.
set height to 3 flash lights spin around fly up height
Lines two and three do not touch the box.
The box still holds 3.
Line four uses it. Up 3 spaces!
HOW HIGH DOES NOVA FLY?
- Read the whole program.
- Tap how high Nova flies.
set height to 2
fly up height
?
set height to 4
beep a song
fly up height
?
set height to 5
spin around
flash lights
fly up height
?
Now build a flight.
Nova must fly up 4 spaces.
Then flash the lights and land.
BUILD A FLIGHT UP 4
- Read each card.
- Fly up 4, flash, then land.
1line 1
2line 2
3line 3
4line 4
Two boxes, two names
TRICKY ONES!
- Read every line carefully.
- Tap what Nova does.
set height to 2
set speed to 5
fly up height
?
fly up height
set height to 3
?
The box remembered!
Fill the box once.
Use it lines later.
The box does not forget.
See you tomorrow, Crew!