diff --git a/src/lexer.js b/src/lexer.js
index 7725231..380d574 100644
--- a/src/lexer.js
+++ b/src/lexer.js
@@ -86,8 +86,8 @@ class Juicescript_lexer {
 				break;
 				
 			case "=":
-				if		(this.match("="))		this.token_add({type: Juicescript.token_type.EQUAL});
-				else							this.error("unexpected character '" + this.char + "'");
+				if		(this.match("="))		this.token_add({type: Juicescript.token_type.EQUAL_EQUAL});
+				else							this.token_add({type: Juicescript.token_type.EQUAL});
 				break;
 				
 			case "<":
diff --git a/src/main.js b/src/main.js
index 866bae8..4cdce44 100644
--- a/src/main.js
+++ b/src/main.js
@@ -13,8 +13,8 @@ class Juicescript {
 		"NULL",
 		
 		// operators
-		"NOT",
-		"EQUAL", "NOT_EQUAL",
+		"EQUAL", "NOT",
+		"EQUAL_EQUAL", "NOT_EQUAL",
 		"GREATER", "GREATER_EQUAL",
 		"LESS", "LESS_EQUAL",
 		
@@ -33,6 +33,12 @@ class Juicescript {
 	);
 	
 	
+	// ARGUMENT TYPES //
+	static argument_type = new Juicescript_helper_enum(
+		"VARIABLE", "LITERAL"
+	);
+	
+	
 	
 	/*
 		CONSTRUCTOR: Return new juicescript parser with OPTIONS
@@ -103,6 +109,6 @@ class Juicescript {
 		Run previously parsed program
 	*/
 	run(){
-		//*/ TODO
+		/**/console.log(this.program_tree);
 	}
 }