diff --git a/main.go b/state.go
similarity index 99%
rename from main.go
rename to state.go
index 6472a30..170eb21 100644
--- a/main.go
+++ b/state.go
@@ -1,4 +1,4 @@
-package main
+package vm
 
 import "bytes"
 import "encoding/hex"
diff --git a/state_test.go b/state_test.go
new file mode 100644
index 0000000..83f9935
--- /dev/null
+++ b/state_test.go
@@ -0,0 +1,47 @@
+package vm
+
+import "encoding/hex"
+import "strings"
+import "testing"
+
+func TestFirst(t *testing.T) {
+	asm := [][]string{
+		[]string{
+			"0000020000000000010000000000000000000000000000000000000000000001",
+			"0000000100000000000000000000000000000001000000000000000000000000",
+			"0000030100000000010000000000000000000000000000000000000000000003",
+			"000004010000000000000000fffffffffffffffd000000000000000000000000",
+		},
+		[]string{
+			"0000020000000000020000000000000000000000000000000000000000000001",
+		},
+	}
+
+	functionByteCode := [][]byte{}
+
+	for _, fnc := range asm {
+		fncString := strings.Join(fnc, "")
+
+		byteCode, err := hex.DecodeString(fncString)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		functionByteCode = append(functionByteCode, byteCode)
+	}
+
+	state, err := NewState(functionByteCode)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	state.Execute()
+
+	if state.Error != nil {
+		t.Fatal(state)
+	}
+
+	if state.GlobalMemory[0] != 3 {
+		t.Fatal(state.GlobalMemory[0])
+	}
+}