diff --git a/src/simulator/loader.rs b/src/simulator/loader.rs
new file mode 100644
index 0000000..0391aed
--- /dev/null
+++ b/src/simulator/loader.rs
@@ -0,0 +1,33 @@
+use crate::Machine;
+
+use std::fs;
+use std::io;
+use std::io::BufRead;
+
+
+
+	/// Load a file into a new machine
+	/// 
+	/// `panic!` when size is not 1, 2, 4 or 8
+    /// `panic!` when the text does not represents instructions in hexadecimal
+	/// 
+	/// ### Parameters
+	/// 
+	/// - **path** the path of the file to load
+	/// - **size** the number of bytes to write (1, 2, 4 or 8)
+pub fn load(path : &str, instruction_size: i32) -> Machine {
+    let file = fs::File::open(path).expect("Wrong filename");
+    let reader = io::BufReader::new(file);
+    let mut machine = Machine::_init_machine();
+
+    for (i,line) in reader.lines().enumerate() {
+        let res = u64::from_str_radix(&line.unwrap(), 16);
+        match res {
+            Ok(value) => {
+                Machine::write_memory(&mut machine, instruction_size, i, value);
+            },
+            _ => panic!()
+        }
+    }
+    machine
+}
\ No newline at end of file
diff --git a/src/simulator/mod.rs b/src/simulator/mod.rs
index 54d271e..6ee59e2 100644
--- a/src/simulator/mod.rs
+++ b/src/simulator/mod.rs
@@ -2,7 +2,7 @@ pub mod machine;
 pub mod decode;
 pub mod print;
 pub mod mem_cmp;
-
+pub mod loader;
 
 pub mod global {