diff --git a/installer/install.sh b/installer/install.sh
index 9a60f9a..9213c8b 100644
--- a/installer/install.sh
+++ b/installer/install.sh
@@ -1,9 +1,21 @@
 #!/bin/bash -x
 # Usage: bash install.sh
 
+NODEJS=14.17.0
+
+# install lgpio (and python3)
+sudo apt update
+sudo apt install python3 swig python3-dev python3-setuptools -y
+wget http://abyz.me.uk/lg/lg.zip
+unzip lg.zip
+rm lg.zip
+cd lg
+make
+sudo make install
+
 # install node.js (=electron node version) via n (https://github.com/tj/n)
 curl -L https://raw.githubusercontent.com/tj/n/master/bin/n -o n
-sudo bash n 14.17.0
+sudo bash n $NODEJS
 # install python code formatter
 python3 -m pip install black
 # install desktop entry
diff --git a/ugj_blocks.js b/ugj_blocks.js
index ef66b17..4bf0879 100644
--- a/ugj_blocks.js
+++ b/ugj_blocks.js
@@ -2677,18 +2677,26 @@ Blockly.JavaScript['ugj_blackboard_content'] = function (block) {
 /************* */
 /** Soft Sleep */
 /************* */
+var ugjSleepDefinition = {
+  "type": "ugj_sleep",
+  "message0": "%{BKY_UGJ_SLEEP_TITLE}",
+  "args0": [
+    {
+      "type": "input_value",
+      "name": "sec",
+      "check": "Number"
+    }
+  ],
+  "inputsInline": true,
+  "previousStatement": null,
+  "nextStatement": null,
+  "tooltip": "%{BKY_UGJ_SLEEP_TOOLTIP}",
+  "helpUrl": "",
+  "style": "special_blocks"
+};
 Blockly.Blocks['ugj_sleep'] = {
   init: function () {
-    this.appendValueInput("sec")
-      .setCheck("Number");
-    this.appendDummyInput()
-      .appendField("秒待つ");
-    this.setInputsInline(true);
-    this.setPreviousStatement(true, null);
-    this.setNextStatement(true, null);
-    this.setStyle('special_blocks')
-    this.setTooltip("指定した秒数だけ処理を中断します。");
-    this.setHelpUrl("");
+    this.jsonInit(ugjSleepDefinition);
   }
 };
 Blockly.JavaScript['ugj_sleep'] = function (block) {
@@ -2698,10 +2706,17 @@ Blockly.JavaScript['ugj_sleep'] = function (block) {
     ['const ' + Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_ + ' = milisec =>',
       'new Promise(r => setTimeout(r, milisec));']
   );
-  var code = `await ${functionName}(${value_sec}*1000);`;
+  var code = `await ${functionName}(${value_sec}*1000);\n`;
+  return code;
+};
+Blockly.Python['ugj_sleep'] = function(block) {
+  var value_sec = Blockly.Python.valueToCode(block, 'sec', Blockly.Python.ORDER_ATOMIC);
+  Blockly.Python.provideFunction_(
+    'import_sleep', ['from time import sleep']
+  )
+  var code = `sleep(${value_sec})\n`;
   return code;
 };
-
 /********************* */
 /** Carriage Return ** */
 /********************* */
diff --git a/ugj_script.js b/ugj_script.js
index 1610230..25c7565 100644
--- a/ugj_script.js
+++ b/ugj_script.js
@@ -123,6 +123,8 @@ Blockly.Msg["UGJ_DECTOHEX_TOOLTIP"] = "10進数を16進数に変換します。"
 
 Blockly.Msg["UGJ_CANVAS_INIT_TITLE"] = "キャンバスを表示";
 Blockly.Msg["UGJ_CANVAS_INIT_TOOLTIP"] = "キャンバスを表示し、使用できるようにします。";
+Blockly.Msg["UGJ_SLEEP_TITLE"] = "%1 秒待つ";
+Blockly.Msg["UGJ_SLEEP_TOOLTIP"] = "指定した秒数だけ処理を中断します。";
 
 // Customize Toolbox
 class CustomCategory extends Blockly.ToolboxCategory {