diff --git a/server.js b/server.js
index f90a314..95580a7 100644
--- a/server.js
+++ b/server.js
@@ -22,7 +22,7 @@ app.get('/', (req, res) => res.sendStatus(200))
 // Sense HAT 初始化
 sense.lowLight = true
 sense.setRotation(180)
-sense.clear()
+sense.clear([128, 0, 255])
 
 io.on('connection', (client) => {
     console.log(`client conncted: ${client.id}`)