diff --git a/33-lifecycle-lab_v16/src/03-custominput.jsx b/33-lifecycle-lab_v16/src/03-custominput.jsx
index 8790780..d234977 100644
--- a/33-lifecycle-lab_v16/src/03-custominput.jsx
+++ b/33-lifecycle-lab_v16/src/03-custominput.jsx
@@ -1,10 +1,80 @@
-/**
- * Implment an input component that shows 4
- * input boxes writing user input in the currently
- * focused panel
- *
- * See lab description on the webpage for a live example
- * how this should work.
- */
-
-
+import React from 'react';
+import PropTypes from 'prop-types';
+
+export default class SquareFocus extends React.Component{
+
+    constructor(props) {
+        super(props);
+        this.state = {texts : []};
+    }
+
+
+    setFocus = (el,index) =>{
+        if(el!=null){
+            el.focus()
+            el.style.backgroundColor = "#ccc";
+        }
+    }
+
+    fillText = (e,index) =>{
+        let isFocused = (document.activeElement === e.target);
+        if(isFocused){
+            if(document.activeElement.innerHTML != ''){
+                let updatedArr = this.state.texts;
+                updatedArr[index] = {txt : String.fromCharCode(e.keyCode)};
+                this.setState({texts:updatedArr});
+            }else{
+            this.setState({texts:[...this.state.texts , {txt : String.fromCharCode(e.keyCode)} ]});
+            }
+        }
+    }
+
+    componentDidUpdate(){
+          let activeEl = document.activeElement;
+          activeEl.style.backgroundColor = "white";
+          activeEl.blur();
+          let parentDiv =  this.parent
+          if(activeEl.nextSibling!=null){
+           this.setFocus(activeEl.nextSibling);
+          }else{
+            parentDiv.children[0].focus()
+            parentDiv.children[0].style.backgroundColor = "#ccc";
+        }
+      }
+
+    render(){
+ 
+      return (<div ref={parent => { this.parent = parent }}>
+            <SquareDiv focus={(e) =>this.setFocus(e.target)} typeKey={(e,index) => this.fillText(e,0)} text={this.state.texts[0]}/>
+            <SquareDiv focus={(e) =>this.setFocus(e.target)} typeKey={(e,index) => this.fillText(e,1)} text={this.state.texts[1]}/>
+            <SquareDiv focus={(e) =>this.setFocus(e.target)} typeKey={(e,index) => this.fillText(e,2)} text={this.state.texts[2]}/>
+            <SquareDiv focus={(e) =>this.setFocus(e.target)} typeKey={(e,index) => this.fillText(e,3)} text={this.state.texts[3]}/>
+        </div>);
+    }
+
+}
+
+function SquareDiv(props){
+    const char = {
+        display: 'inline-block',
+        verticalAlign: 'top',
+        height: '100px',
+        width: '100px',
+        border: '1px solid',
+        margin: '0 5px',
+        textAlign: 'center',
+        lineHeight: '100px',
+        fontSize: '32px'
+      }
+
+    
+    return <div tabIndex='1' style={char} onFocus={props.focus} onKeyDown={props.typeKey}>
+                {props.text.txt}
+            </div>
+  }
+
+  
+  SquareDiv.propTypes = { focus: React.PropTypes.func,
+                          typeKey: React.PropTypes.func,
+                          text: React.PropTypes.object};
+  SquareDiv.defaultProps = {text: {txt:""} };
\ No newline at end of file