started cleaning up and organizing code

src/Main.java

@@ -1,5 +1,16 @@
-public class Main {
+import generator.Fun;
+import generator.Gen;
+
+public class Main implements Runnable {
     public static void main(String[] args) {
-        System.out.println("Hello, World!");
+        Fun.runWithGeneratorSupport(Main.class);
+    }
+
+    @Override
+    public void run() {
+        var gen = Lexer.parse("f7(x,y,z,w, u,v, othersIg) = v-(x*y+y+ln(z)^2*sin(z*pi/2))/(w*u)+sqrt(othersIg*120e-1)");
+        while(gen.next() instanceof Gen.Yield(var tok)) {
+            System.out.println(tok);
+        }
     }
 }