I used part of the "Laundry App UI Kit Sketch Resource" design that was designed by Satheesh Kumar at: https://www.sketchappsources.com/free-source/3397-laundry-app-ui-kit-sketch-freebie-resource.html to create a quick prototype

3 different counters using variables 1. A standard counter 2. A counter from the number of seconds the user sets 3. A countdown

A clean product card carousel as seen on: https://www.sketchappsources.com/free-source/3173-product-card-view-sketch-freebie-resource.html Infinite loop scrolling added

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Citrix Tech Fair entry demonstrating concepts for Secure Mail.