How to screw the code together in Scala

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The fun way to practice all these elements of the layout library is to write a program that draws spirals on a given number of boundaries.

Import Element.elem object Spiral {val space = elem (") val corner = elem (" + ") def spiral (nEdges: Int, direction: Int): Element = {if (nEdges = = 1) elem (" + ") else {val sp = spiral (nEdges-1, (direction + 3)% 4) def verticalBar = elem ('|', 1, sp.height) def horizontalBar = elem ('-', sp.width 1) if (direction = = 0) (corner beside horizontalBar) above (sp beside space) else if (direction = = 1) (sp above space) beside (corner above verticalBar) else if (direction = = 2) (space beside sp) above (horizontalBar beside corner) else (verticalBar above corner) beside (space above sp)} def main (args: Array [String]) {val nSides = args (0). ToInt println (spiral (nSides, 0))}}

Because Spiral is a separate object with the appropriate signature of the main method, it is a Scala program. Spiral takes a command-line argument, an integer, and draws a spiral with a specific number of boundaries. For example, you can draw a six-boundary spiral as shown on the left below, or a larger spiral like the one on the right (slightly)

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