# Liikennematto devlog #2: build your own roundabout!

**URL:** <https://discourse.elm-lang.org/t/liikennematto-devlog-2-build-your-own-roundabout/6200>\
**Category:** Show and Tell\
**Created:** [August 25, 2020, 7:46am UTC](https://discourse.elm-lang.org/t/liikennematto-devlog-2-build-your-own-roundabout/6200 "2020-08-25T07:46:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![klemola](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.elm-lang.org/klemola/32/4593_2.png) [@klemola](https://discourse.elm-lang.org/u/klemola)\
**Post date:** [August 25, 2020, 7:46am UTC](https://discourse.elm-lang.org/t/liikennematto-devlog-2-build-your-own-roundabout/6200/1 "2020-08-25T07:46:30Z")

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Hi! I recently dove into `elm-ui` and built a map editor for my traffic simulation prototype. It uses bit masking and has a simple mouse-based control scheme. Maybe my experiences are helpful for others building simulations/games? Anyhow, here’s a new blog post in my devlog.

[https://matiasklemola.com/liikennematto-devlog-two](https://matiasklemola.com/liikennematto-devlog-two)

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**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/elm_lang/original/1X/50a05e53677a2c3b47776d7abd0f113eb50193a1.png) [@system](https://discourse.elm-lang.org/u/system)\
**Post date:** [September 4, 2020, 7:46am UTC](https://discourse.elm-lang.org/t/liikennematto-devlog-2-build-your-own-roundabout/6200/2 "2020-09-04T07:46:32Z")

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Closed on September 4, 2020, 7:46am UTC

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