Project 8 XGO Emoji Show

Ⅰ. Teaching Aims

Invoke the built-in LED dot matrix emoji of Foxbit and control the switching rhythm.
Use the buzzer play note to play a single sound and add sound effects to the emojis.
Without using loop statements, present the “emoji + sound” in sequence.

XGO + Foxbit + MicroBlocks IDE.
XGO battery power ≥ 60 %. The robot is placed on a stable table.
MicroBlocks status bar shows a green dot, XGO-lite extension is loaded and the development board model is Foxbit.
First, run play note "C4" 300 to confirm that the buzzer sounds normally.


Functions	5 × 7 dot matrix display preset expressions
Common misuses	Spell it as `display expression` → Report an error

Functions	The buzzer plays a single tone
Common misuses	note is blank or the duration is 0 → silent

Functions	Maintain the current emoji or note
Common misuses	`<200 ms` , emojis are hard to distinguish

Functions	Tuzrn off the LED dot matrix
Common misuses	Omit this → The LED remains on constantly

After running, the 6 emojis are displayed in sequence, each frame for 500 ms, and clear display at the end.

Online code: Click here

Based on Test 1, add a note to each frame of emoji:

Every time an emoji is changed, the corresponding note is played immediately to form a “music-emoji show”.

Online code: Click here

Why does display image have to be redone at each step in the action instead of just writing it once?
If you want the entire show to repeat three times, would using repeat be more concise than copying the code?
What other “accessory” can be added to it, such as the long sound of the buzzer, the rotation of the body, the flashing of the LED, etc.?

Questions	Possible causes	Solutions
No sound	note is misspelled or duration is 0	Use capital note names `"G4"`, with a duration of ≥ 100 ms
Emoji does not change	`display image` was misspelled or omitted	Write one valid instruction for each frame
Emoji displays too fast	`wait` is too short	It is recommended that the single frame be ≥ 200 ms
LED is always on	Omit `clear display	Add `clear display` at the end of the script
The buzzer is distorted	note frequency is too fast	Select notes within C4 to C6