diff --git a/src/io.js b/src/io.js
index 17320a2..ff1fc3c 100644
--- a/src/io.js
+++ b/src/io.js
@@ -21,6 +21,14 @@ class Juicescript_io {
 	get stderr(){
 		return {
 			debug: (text, additional) => {
+				// PRETTY PRINT INCOMMING DATA? //
+				// object
+				if(typeof text === "object"){
+					text = "Object" + "\n" + JSON.stringify(text, null, 4);
+				}
+				
+				
+				// OUTPUT //
 				// add defaults
 				additional ??= {};
 				additional.line ??= null;
diff --git a/src/main.js b/src/main.js
index ae56e62..062ee6f 100644
--- a/src/main.js
+++ b/src/main.js
@@ -110,6 +110,7 @@ class Juicescript {
 		Run previously parsed program
 	*/
 	run(){
+		/**/this.io.stderr.debug(this.program_tree);
 		/**/console.log(this.program_tree);
 	}
 }