added Tree

src/logo/Tree.scala

@@ -0,0 +1,36 @@
+package logo
+
+import hevs.graphics.TurtleGraphics
+
+import java.awt.Point
+
+class Tree(width: Int, height: Int, val angleStep: Double) extends TurtleGraphics(width, height) {
+  def drawTree(n: Int, length: Double): Unit = {
+    if (n > 1) {
+      drawBranch(length)
+      val pos: Point = getPosition()
+      val angle: Double = getTurtleAngle()
+
+      turn(-angleStep )
+      drawTree(n - 1, length * 0.8)
+      jump(pos.x, pos.y)
+      setAngle(angle)
+      turn(angleStep)
+      drawTree(n - 1, length * 0.8)
+    } else {
+      drawBranch(length)
+    }
+  }
+
+  def drawBranch(length: Double): Unit = {
+    forward(length)
+  }
+}
+object Tree {
+  def main(args: Array[String]): Unit = {
+    val tree: Tree = new Tree(400, 400, 15)
+    tree.jump(200, 400)
+    tree.setAngle(-90)
+    tree.drawTree(8, 60)
+  }
+}