(upbeat music)

Hello and welcome to day seven of CS first art.

Today you will create a project for a piece of software that an architect could use to quickly prototype a building.

An architect is a professional building designer.

They design structures like houses, bridges, schools, museums and sports arenas.

Architects rely on software built by computer scientists to help them visualize, test and communicate about their designs.

In architecture, as well as in other forms of art design, simple shapes combine to make bigger, more complex shapes or structures.

Take a look at a few buildings known throughout the world for their architectural design.

The White House is made up of triangles and rectangles.

Once complete today's project will allow you and others to build interesting buildings using a variety of simple stamped shapes.

You will use a repeat until loop to create this project.

The repeat until loop is similar to a repeat loop except instead of stopping after a specified number of times it keeps going until a particular condition is true.

Remember a condition in computer science is something that must be true in order for something else to happen.

For example, if you want to get your friend Joe's attention, you'll repeat calling his name until he answers you.

His answering you is the condition that must be true and the something that will happen is that you will stop calling.

You might call once or you might call 10 times.

How many times depends on the condition.

You will repeat calling Joe's name until he answers.

The art project you see here also uses a repeat until loop.

It repeats drawing silkweed until the user stops holding the mouse.

Today's project uses repeat until to make a stamp follow the mouse pointer until the mouse is clicked.

To start today's project Remix the starter project by clicking on the link, signing into Scratch, and clicking Remix.

Now it's your turn.

Click on the starter project link and sign in.

And click Remix.


Open the starter project.
  • Weave Silk by Yuri Vishnevsky ( licensed under CC-BY 3.0 ( -- No modifications made
  • "Обзор САПР (CAD) программы. 3D Home Architect Design Suite Deluxe 8" by continentpc ( -- Licensed by Creative Commons Attribution 3.0 Unported ( -- Video trimmed to needed length | Audio removed
  • "Suburban tract house" by BrendelSignature ( -- Licensed by CC BY-SA 3.0 ( -- Image scaled up, cropping edges
  • "FIU SOA" by Comayagua99 ( -- Licensed by Creative Commons Attribution 3.0 Unported ( -- Image scaled up, cropping edges
  • "I-74 bridge replacement - Architect Rendering - 04" by Wszan ( -- Licensed by CC BY-SA 4.0 ( -- Image scaled up, cropping edges
  • "Perth Arena November 2012" by Kollision ( -- Licensed by Creative Commons Attribution 3.0 Unported ( -- Image scaled up, cropping edges