diff --git a/sketch.js b/sketch.js
index b30c06c..2c2e862 100644
--- a/sketch.js
+++ b/sketch.js
@@ -1,8 +1,15 @@
 function setup() {
-  createCanvas(400, 400);
+  createCanvas(400, 200);
+  background(220);
+  noLoop();
 }
 
 function draw() {
-  background(250,0,250);
-  ellipse(200, 200, 3, 80);
-}
+  fill(128, 128, 0);
+  noStroke();
+
+  // ここで dia を 60 に設定する
+circle(100, 100, dia);
+circle(200, 100, dia);
+circle(300, 100, dia);
+}
\ No newline at end of file