diff --git a/lexer/lexer.go b/lexer/lexer.go
new file mode 100644
index 0000000..2c61d03
--- /dev/null
+++ b/lexer/lexer.go
@@ -0,0 +1,8 @@
+package lexer
+
+type Lexer struct {
+	input        string
+	position     int
+	readPosition int
+	ch           byte
+}