diff --git a/index.php b/index.php
index fc763cc..c111cf5 100755
--- a/index.php
+++ b/index.php
@@ -20,7 +20,7 @@ var_dump($res);
 		<g stroke="black" stroke-width=2></g>
 	</svg>
 	<script type="text/javascript">
-		draw_roulette(3, 200, 200);
+		draw_roulette(3, 200, 200, 200);
 	</script>
 </body>
 </html>
diff --git a/script.js b/script.js
index be89685..fb70379 100755
--- a/script.js
+++ b/script.js
@@ -1,10 +1,11 @@
 
-function draw_roulette(nb_person, x, y){
-	let chart = document.getElementById("roulette").querySelector('g')[0];
+function draw_roulette(nb_person, x, y, r){
+	let chart = document.getElementById("roulette").querySelector('g');
 	let starting_coo= new Array(x, y);
+	let center = new Array(x + r, y + r);
 	let angle = 0;
 	for (let i=0; i < nb_person; i++){
-		let coo_arr = new Array(250 - 50 * Math.cos(2 * Math.PI / nb_person * (i+1)), 200 - 50 * Math.sin(2 * Math.PI / nb_person * (i+1)));
+		let coo_arr = new Array(center[0] - r * Math.cos(2 * Math.PI / nb_person * (i+1)), center[y] - r * Math.sin(2 * Math.PI / nb_person * (i+1)));
 		let new_path = document.createElement("path");
 		new_path.setAttribute('fill', 'green');
 		new_path.setAttribute('d', "M " + starting_coo[0] + " " + starting_coo[1] + " A 50 50 0 0 1 " + coo_arr[0] + " " + coo_arr[1] + " L 250 200 Z");