implemented clear

Advanced Software Engineering/Advanced Software Engineering/Verbs/DrawingVerbs/Clear.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Advanced_Software_Engineering {
+    public class Clear : Verb {
+        Drawer drawer;
+
+        public Clear(Drawer drawer) {
+            this.drawer = drawer;
+        }
+
+        public void ExecuteVerb() => drawer.ClearCanvas();
+
+        public string GetDescription() {
+            return "Clears the canvas";
+        }
+
+    }
+}

Advanced Software Engineering/Advanced Software Engineering/Verbs/VerbFactory.cs

@@ -129,6 +129,7 @@ namespace Advanced_Software_Engineering {
 
                 case "dot":
                 case "clear":
+                    return new Clear(drawer);
                 case "pen":
                 case "fill":
                     throw new Exception("Not implemented");