b. Place it into“on start”block，
c. Signal end P8 of WS2812 RGB is controlled by P8 of micro:bit . So we set
to P8.
d. Smart car has 4 pcs WS2812 RGB lights, so set to 4 leads
Click“Loops”to drag“for index from 0 to 4...do”into“forever”block
Change 4 into 3
Click“Neopixel”to move block“strip clear”into block“for index from 0 to
3...do”
Tap“Neopixel”→“more”→“strip set pixel color at 0 to red”
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