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https://github.com/KarolS/millfork.git
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46 lines
1.0 KiB
Plaintext
46 lines
1.0 KiB
Plaintext
void main() {
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byte colour
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byte colour_index
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byte wait_for
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byte bar_start
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byte direction
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colour = 0
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disable_irq()
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vic_cr1 = 0
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vic_border = black
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bar_start = $50
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direction = 1
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while true {
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wait_for = bar_start
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for colour_index, 0, until, colours.length {
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colour = colours[colour_index]
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while wait_for != vic_raster { }
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stabilize(8)
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vic_border = colour
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wait_for += 2
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}
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bar_start += direction
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if bar_start == $50 { direction = 1 }
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if bar_start == $A0 { direction = $ff }
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}
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}
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asm void stabilize(byte x){
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burn:
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DEX
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BNE burn
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RTS
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}
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const array colours = [
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$06, $06, $06, $0e, $06, $0e,
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$0e, $06, $0e, $0e, $0e, $03,
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$0e, $03, $03, $0e, $03, $03,
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$03, $01, $03, $01, $01, $03,
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$01, $01, $01, $03, $01, $01,
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$03, $01, $03, $03, $03, $0e,
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$03, $03, $0e, $03, $0e, $0e,
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$0e, $06, $0e, $0e, $06, $0e,
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$06, $06, $06, $00, $00, $00
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] |