diff --git a/lesson7/marshalling/21_gob_marshal_basic_types.go b/lesson7/marshalling/21_gob_marshal_basic_types.go
new file mode 100644
index 0000000..19c6997
--- /dev/null
+++ b/lesson7/marshalling/21_gob_marshal_basic_types.go
@@ -0,0 +1,37 @@
+package main
+
+import (
+	"bytes"
+	"encoding/gob"
+	"encoding/hex"
+	"fmt"
+)
+
+func encodeAndDecode(msg string, value interface{}) {
+	var buffer bytes.Buffer
+	encoder := gob.NewEncoder(&buffer)
+
+	err := encoder.Encode(value)
+	if err != nil {
+		fmt.Println(err)
+	} else {
+		content := buffer.Bytes()
+		fmt.Printf("%s value encoded into %d bytes\n", msg, len(content))
+		encoded := hex.EncodeToString(content)
+		fmt.Println(encoded)
+	}
+}
+
+func main() {
+	var b bool = true
+	encodeAndDecode("Boolean", b)
+
+	var x uint8 = 42
+	encodeAndDecode("Uint8", x)
+
+	var y uint16 = 42
+	encodeAndDecode("Uint16", y)
+
+	var z uint32 = 42
+	encodeAndDecode("Uint32", z)
+}