diff --git a/src/machine.rs b/src/machine.rs
index 1ac9c62..bc53171 100644
--- a/src/machine.rs
+++ b/src/machine.rs
@@ -1,23 +1,42 @@
-use crate::decode::*;
+#[warn(unused_parens)]
 
+use crate::decode::*;
+use crate::print::*;
 
 pub struct Machine {
-	pub _pc : u32,
-	pub _int_reg : [u32 ; 32],
-	pub _instructions : [u32 ; 100]
+	pub pc : u32,
+	pub int_reg : [u32 ; 32],
+	pub instructions : [u32 ; 100]
 }
 
 
 impl Machine {
-	
-	fn _init_machine() -> Machine {	
+
+	pub fn _init_machine() -> Machine {	
 
 		Machine {
-			_pc : 0,
-			_instructions : [0 ; 100],
-			_int_reg : [0 ; 32]
+			pc : 0,
+			instructions : [0 ; 100],
+			int_reg : [0 ; 32]
 		}	
 	}
+
+	pub fn oneInstruction(mut machine : Machine) -> Machine {
+		if (machine.instructions.len() <= machine.pc as usize) {
+			println!("ERROR : number max of instructions rushed");
+			return machine;
+		}
+		let inst : Instruction = decode(machine.instructions[machine.pc as usize]);
+		machine.pc += 1;
+		match (inst.opcode) {
+			RISCV_LUI => {
+				machine.int_reg[inst.rd as usize] = inst.imm31_12;
+			},
+		}
+
+
+		machine
+	}
 }
 
 #[cfg(test)]
diff --git a/src/main.rs b/src/main.rs
index 346a5b8..9eb5d76 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,4 +5,8 @@ mod machine;
 fn main() {
     let instr = decode::decode(98);
     println!("{}", print::print(instr, 0));
+
+    let mut m = machine::Machine::_init_machine();
+    m.instructions[0] = 0x37;
+    machine::Machine::oneInstruction(m);
 }