pico8-0hh1/bg.lua

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Lua
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function draw_animated_bg(startx)
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if (amplitude <= 0) return
startx = startx or 0
fillp(0b0101101001011010)
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local color = 1
-- vertical lines
local t = t() + 10
for i = startx - 1, 127, 9 do
local a = sin(i * t / 512) * amplitude + 64
local b = cos(i * t / 256) * amplitude + 64
line(
i,
a,
i,
b,
color
)
end
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-- horizontal lines
for i = startx - 1, 127, 9 do
local a = sin(i * t / 512) * amplitude + 64
local b = cos(i * t / 256) * amplitude + 64
line(
a,
i,
b,
i,
color
)
end
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end
function draw_bg_menu()
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end