FRAN
1 program
Added 2026-03-05T10:00:00Z
Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled
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Aliases: Functional Reactive Animation
Provenance: commit cc07f66d05 · authored 2026-03-05T17:29:27+01:00 · agent claude-code · model claude-sonnet-4-6
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2 sources · pl_id:
pl/franRelated languages
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Wiggling and Orbiting Balls
Provenance: commit cc07f66d05 · authored 2026-03-05T17:29:27+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled
-- FRAN (Functional Reactive Animation) tutorial example
-- Source: https://conal.net/fran/tutorial.htm
module Main where
import Fran
-- A ball whose size wiggles over time
wiggleBall :: ImageB
wiggleBall = stretch (2 + wiggle) (solidEllipse yellow)
-- A ball orbiting in a circle
orbitingBall :: ImageB
orbitingBall =
move (cos2 1 0 * 2, sin2 1 0 * 2) $
withColor red (solidCircle 0.3)
-- Combine both animations side by side
combined :: ImageB
combined = wiggleBall `over` orbitingBall
main :: IO ()
main = animate combined