Command is the building block of the turtle graphics. Every function, except render and branch, is a command that change the location, direction, width and color of the relative cursor ("turtle").

Moves the turtle forward by x pixels.

Changes the turtle's direction by x degrees (counterclockwise). The initial direction is "left-to-right".

Changes the stroke width of the turtle's pen by x pixels. The initial value is 1.0 pixel. Providing a negative number will decrease the stroke width.

Rotates the hue of the turtle's pen by x. Hue values range between 0.0 and 1.0. The initial color of the pen is black (hue = 0.0).

Increases the saturation of the turtle's pen by x. Saturation values range between 0.0 and 1.0. The initial color of the pen is black (saturation = 0.0). Providing a negative number will decrease the saturation.

Increases the lightness of the turtle's pen by x. Lightness values range between 0.0 and 1.0. The initial color of the pen is black (lightness = 0.0). Providing a negative number will decrease the saturation.

Increases the alpha value of the turtle's pen by x. Alpha ranges between 0.0 and 1.0. The initial alpha value of the pen is 1.0). Providing a negative number will increase the transparency.

Increases the percentage of red by x. The percentage of red ranges between 0.0 and 1.0. The initial color of the pen is black (red pct = 0.0). Providing a negative number will decrease the percentage of red.

Increases the percentage of green by x. The percentage of green ranges between 0.0 and 1.0. The initial color of the pen is black (green pct = 0.0). Providing a negative number will decrease the percentage of green.

Increases the percentage of blue by x. The percentage of blue ranges between 0.0 and 1.0. The initial color of the pen is black (blue pct = 0.0). Providing a negative number will decrease the percentage of blue.

Turns a list of commands into a single Command.

Takes a background color and a Command (usually a branch of commands) and renders it to Html using Svg.