Use import statements to import names from libraries.

Import Names

Access the value bound to a name by using the name in an expression.

Use Names

Represent numbers in code using numeric literals.

Write pieces of code that compute a value.

Compute numeric values by composing expressions with arithmetic operators.

Ask a function to do its computation and to return the result.

Call a function to output a given textual or graphical value.

Introduce a Variable by naming something, so you can then refer to that thing by using that name.

Specify which types of values function parameters can accept, and which type of values a function will return.

Use predefined colors like red, green, and blue.

Create any color you like by describing it as a point in some color space.

Create primitive graphics like rectangles, ellipses, triangles, circular sectors, and texts.

Create a rotated version of a given graphic.

Create a composite graphic from two given graphics.

Generate Code, whose functions almost only contain variables.

Define Codefragments as constant to reuse them in this exact same way.