diff --git a/conf.pest b/conf.pest
index 5ed23cc..cdad2d5 100644
--- a/conf.pest
+++ b/conf.pest
@@ -2,4 +2,4 @@ World = { HeaderWorld ~ NEWLINE+ ~ Robot+ }
 HeaderWorld = { ASCII_DIGIT+ ~ " " ~ ASCII_DIGIT+ }
 Robot = { HeaderRobot ~ NEWLINE ~ Instructions ~ NEWLINE+ }
 HeaderRobot = { ASCII_DIGIT+ ~ " " ~ ASCII_DIGIT+ ~ " " ~ ("S" | "N" | "W" | "E") }
-Instructions = { ("F" | "L" | "R")+ }
+Instructions = { (("F" | "L" | "R")+) | "" }
diff --git a/src/main.rs b/src/main.rs
index 843f0bd..aabe45f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -113,10 +113,17 @@ fn parse_config(conf: String, pool: &mut Vec<robot::Robot>) -> Result<world::Wor
                                 })
                             }
                             Rule::Instructions => {
-                                let instructions = inner_robot.as_str();
-                                vinst.push(robot::instructions_from_string(
-                                    instructions.chars().rev().collect::<String>(),
-                                )?);
+                                if !(inner_robot.as_str() == "") {
+                                    let instructions = inner_robot.as_str();
+                                    vinst.push(robot::instructions_from_string(
+                                        instructions.chars().rev().collect::<String>(),
+                                    )?);
+                                } else {
+                                    let instructions = robot::gen_random_instructions();
+                                    vinst.push(robot::instructions_from_string(
+                                        instructions.chars().rev().collect::<String>(),
+                                    )?);
+                                }
                                 let r = robot::Robot::new(
                                     id,
                                     vor.pop().unwrap(),
diff --git a/src/robot.rs b/src/robot.rs
index 33d787d..e48f571 100644
--- a/src/robot.rs
+++ b/src/robot.rs
@@ -116,7 +116,7 @@ pub struct Position {
 }
 
 /// Generate random instructions.
-fn gen_random_instructions() -> String {
+pub fn gen_random_instructions() -> String {
     let mut rng = rand::thread_rng();
     let n = rng.gen_range(5, 10);
     let mut instructions = String::with_capacity(n);