diff --git a/parser/parser.go b/parser/parser.go
index 80a60cc..1f81799 100644
--- a/parser/parser.go
+++ b/parser/parser.go
@@ -176,21 +176,21 @@ func (l_parser *Parser) parse_statement() ast.Statement {
 func (l_parser *Parser) parse_let_statement() *ast.LetStatement {
 	defer untrace(trace("parse_let_statement"))
 
-	statement := &ast.LetStatement{ Token: l_parser.current_token }
+	statement := &ast.LetStatement{Token: l_parser.current_token}
 
-	if !l_parser.expect_peek(token.IDENT){
+	if !l_parser.expect_peek(token.IDENT) {
 		return nil
 	}
 
-	statement.Name = &ast.Identifier{ Token: l_parser.current_token, Value: l_parser.current_token.Literal }
-	if !l_parser.expect_peek(token.ASSIGN){
+	statement.Name = &ast.Identifier{Token: l_parser.current_token, Value: l_parser.current_token.Literal}
+	if !l_parser.expect_peek(token.ASSIGN) {
 		return nil
 	}
 
 	l_parser.next_token()
 	statement.Value = l_parser.parse_expression(LOWEST)
 
-	if l_parser.peek_token_is(token.SEMICOLON){
+	if l_parser.peek_token_is(token.SEMICOLON) {
 		l_parser.next_token()
 	}
 	return statement
@@ -198,12 +198,12 @@ func (l_parser *Parser) parse_let_statement() *ast.LetStatement {
 
 func (l_parser *Parser) parse_return_statement() *ast.ReturnStatement {
 	defer untrace(trace("parse_return_statement"))
-	
+
 	statement := &ast.ReturnStatement{Token: l_parser.current_token}
 	l_parser.next_token()
 
 	statement.ReturnValue = l_parser.parse_expression(LOWEST)
-	
+
 	if l_parser.peek_token_is(token.SEMICOLON) {
 		l_parser.next_token()
 	}
diff --git a/parser/parser_test.go b/parser/parser_test.go
index fb79a30..daf2e01 100644
--- a/parser/parser_test.go
+++ b/parser/parser_test.go
@@ -647,12 +647,12 @@ func TestLetStatements(l_test *testing.T) {
 		}
 
 		statement := program.Statements[0]
-		if !testLetStatement(l_test, statement, tt.expected_identifier){
+		if !testLetStatement(l_test, statement, tt.expected_identifier) {
 			return
 		}
 
 		val := statement.(*ast.LetStatement).Value
-		if !testLiteralExpression(l_test, val, tt.expected_value){
+		if !testLiteralExpression(l_test, val, tt.expected_value) {
 			return
 		}
 	}
diff --git a/repl/repl.go b/repl/repl.go
index 1c36ba7..e69e5ae 100644
--- a/repl/repl.go
+++ b/repl/repl.go
@@ -4,11 +4,23 @@ import (
 	"bufio"
 	"fmt"
 	"io"
-
 	"monkey/lexer"
-	"monkey/token"
+	"monkey/parser"
 )
 
+const MONKEY_FACE = `            __,__
+   .--.  .-"     "-.  .--.
+  / .. \/  .-. .-.  \/ .. \
+ | |  '|  /   Y   \  |'  | |
+ | \   \  \ 0 | 0 /  /   / |
+  \ '- ,\.-"""""""-./, -' /
+   ''-' /_   ^ ^   _\ '-''
+       |  \._   _./  |
+       \   \ '~' /   /
+        '._ '-=-' _.'
+           '-----'
+`
+
 const PROMPT = ">> "
 
 func Start(in io.Reader, out io.Writer) {
@@ -22,10 +34,25 @@ func Start(in io.Reader, out io.Writer) {
 		}
 
 		line := scanner.Text()
-		l := lexer.New(line)
+		l_lexer := lexer.New(line)
+		l_parser := parser.New(l_lexer)
+		program := l_parser.ParseProgram()
 
-		for tok := l.NextToken(); tok.Type != token.EOF; tok = l.NextToken() {
-			fmt.Fprintf(out, "%+v\n", tok)
+		if len(l_parser.Errors()) != 0 {
+			print_parser_errors(out, l_parser.Errors())
+			continue
 		}
+
+		io.WriteString(out, program.String())
+		io.WriteString(out, "\n")
+	}
+}
+
+func print_parser_errors(out io.Writer, errors []string) {
+	io.WriteString(out, MONKEY_FACE)
+	io.WriteString(out, "Woops! I ran into some monkey business here!\n")
+	io.WriteString(out, " parser errors:\n")
+	for _, message := range errors {
+		io.WriteString(out, "\t"+message+"\n")
 	}
 }