diff --git a/e.jsx b/e.jsx
new file mode 100644
index 0000000..0555b61
--- /dev/null
+++ b/e.jsx
@@ -0,0 +1,33 @@
+import React, { Component } from 'react';
+
+class E extends Component {
+  constructor(props) {
+    super(props);
+
+    this.state = {
+      e: 0,
+    };
+
+    this.timer = this.timer.bind(this);
+  }
+
+  componentDidMount() {
+    const eId = setInterval(this.timer, 10);
+    this.setState({ eInterval: eId });
+  }
+
+  componentWillUnmount() {
+    clearInterval(this.state.eInterval);
+  }
+
+  timer() {
+    this.setState({ e: this.state.e + 1 });
+  }
+
+  render() {
+    const e = Array(this.state.e).fill(<p>e</p>);
+    return e;
+  }
+}
+
+export default E;