diff --git a/index.js b/index.js
index 3b24cd5..25b87e5 100644
--- a/index.js
+++ b/index.js
@@ -1,14 +1,29 @@
 var doubler = function(a, b) {
-  return a + a + b + b;
-};
-
-console.assert(doubler(4,2) === 12);
-console.assert(doubler(1,3) === 8);
-console.assert(doubler(-1,3) === 4);
+	if (typeof a === "function") {
+    return a() + a() + b() + b();
+  } else if (typeof a === "object") {
+  	return a.x1 + a.x1 + a.x2 + a.x2
+  } else {
+  	return a + a + b + b
+  }
+}
+console.assert(doubler(4,2) ===12);
+console.assert(doubler(1,3) ===8);
+console.assert(doubler(-1,3) ===4);
 
 console.assert(doubler("a", "b") === "aabb");
 console.assert(doubler("coding", "rocks") === "codingcodingrocksrocks");
 
+
+function m3() { return 3; }
+function m4() { return 4; }
+function m2() { return 2; }
+function m1() { return 1; }
+
+console.assert(doubler(m4, m2) === 12);
+console.assert(doubler(m1, m3) === 8);
+
+
 function m3() { return 3; }
 function m4() { return 4; }
 function m2() { return 2; }
@@ -17,7 +32,9 @@ function m1() { return 1; }
 console.assert(doubler(m4, m2) === 12);
 console.assert(doubler(m1, m3) === 8);
 
-function objectsEqual() { }
+function objectsEqual(a , b) {
+	return a.z + a.t === b.t + b.z
+ }
 
 var a = { z: 42 , t: 7 }, b = { t: 7, z: 42 }
 
diff --git a/tdd2.js b/tdd2.js
new file mode 100644
index 0000000..abe4235
--- /dev/null
+++ b/tdd2.js
@@ -0,0 +1,7 @@
+function decode() {
+	
+}
+
+
+console.assert(decode("Ci", "on", "dg"), === "coding")
+console.assert(decode(29,53,20) === 252930)