diff --git a/index.js b/index.js
index 3907d3b5..f7455cbb 100644
--- a/index.js
+++ b/index.js
@@ -1,36 +1,213 @@
-console.log("works!!", process.argv[2]);
-
 const pg = require('pg');
-
 const configs = {
-    user: 'akira',
+    user: 'chelseaee',
     host: '127.0.0.1',
     database: 'todo',
     port: 5432,
 };
-
 const client = new pg.Client(configs);
+const d = new Date();
+const today = `${d.getDate()}/${(d.getMonth()+1)}/${d.getFullYear()}`
+const now = `${d.getHours()}:${d.getMinutes()}:${d.getSeconds()}`
+const command = process.argv[2]
 
-let queryDoneCallback = (err, result) => {
+let queryDoneCallback = (err, res) => {
     if (err) {
-      console.log("query error", err.message);
+        console.log("query error", err.message);
     } else {
-      console.log("result", result.rows );
+        formatDisplay(res);
     }
     client.end();
 };
 
 let clientConnectionCallback = (err) => {
 
-  if( err ){
-    console.log( "error", err.message );
-  }
+    if (err) {
+        console.log("error", err.message);
+    }
+
+    //ADD ITEMS INTO TO-DO LIST.
+    if (command === 'add') {
+        const inputs = process.argv.slice(3).join(" ");
+        let text = `INSERT INTO items (name) VALUES ('${inputs}') RETURNING id, name`;
+        client.query(text, queryDoneCallback);
+
+        //COMPLETE ITEMS INTO TO-DO LIST.
+    } else if (command === 'done') {
+        const targetItem = process.argv[3];
+        const script = `UPDATE items SET completion = TRUE, completed_at = CURRENT_TIMESTAMP WHERE id=${targetItem}`
+        client.query(script, queryDoneCallback);
+
+        //DISPLAY ITEMS INTO TO-DO LIST.
+    } else if (command === 'show') {
+        client.query(`SELECT * FROM items`, queryDoneCallback);
 
-  let text = "INSERT INTO todo (name) VALUES ($1) RETURNING id";
+        // ARCHIVE AN ITEM IN THE TO-DO LIST.
+    } else if (command === 'archive') {
+        const targetItem = process.argv[3];
+        const script = `UPDATE items SET archived = TRUE WHERE id=${targetItem}`
+        client.query(script, queryDoneCallback);
 
-  const values = ["hello"];
+        // UN-ARCHIVE AN ITEM IN THE TO-DO LIST.
+    } else if (command === 'unarchive') {
+        const targetItem = process.argv[3];
+        const script = `UPDATE items SET archived = FALSE WHERE id=${targetItem}`
+        client.query(script, queryDoneCallback);
 
-  client.query(text, values, queryDoneCallback);
+        // USE ONE OF THE STATS COMMANDS.
+    } else if (command === 'stats') {
+        const statQuery = process.argv[3]
+        let script;
+        switch (statQuery) {
+
+            // GET THE AVERAGE COMPLETION TIME OF EACH TASK.
+            case 'complete-time':
+                script = `SELECT *, EXTRACT(EPOCH FROM (completed_at - created_at)/60)  as mins_diff from items`
+                client.query(script, getAvgTime);
+                break;
+                // GET THE TASKS WITH THE LONGEST / SHORTEST COMPLETION TIME.
+            case 'best-worst':
+                script = `SELECT *, EXTRACT(EPOCH FROM (completed_at - created_at)/60) as mins_diff from items WHERE completion = true ORDER BY mins_diff ASC`
+                client.query(script, bestWorst)
+                break;
+                // GET THE AVERAGE NUMBER OF ITEMS ADDED PER DAY.
+            case 'add-time':
+                script = `SELECT name, date(created_at) AS date FROM items WHERE completion = true;`
+                client.query(script, avgItemsPerDay)
+                break;
+                //GET THE ITEMS CREATED BETWEEN TWO DATES.
+            case 'between':
+                var date1 = process.argv[4];
+                var date2 = process.argv[5];
+                if (process.argv[6] === 'complete-time') {
+                    let order = (process.argv[7]).toLowerCase();
+                    script = `SELECT * FROM items WHERE date(created_at) BETWEEN to_date('${date1}', 'DD/MM/YY') AND to_date('${date2}', 'DD/MM/YY') ORDER BY EXTRACT(EPOCH FROM (completed_at - created_at)/60) ${order}`;
+                } else {
+                    script = `SELECT * FROM items WHERE date(created_at) BETWEEN to_date('${date1}', 'DD/MM/YY') AND to_date('${date2}', 'DD/MM/YY')`;
+                }
+                client.query(script, queryDoneCallback);
+                break;
+                //GET THE ITEMS THAT WERE COMPLETED BETWEEN TWO DATES.
+            case 'completed-between':
+                var date1 = process.argv[4];
+                var date2 = process.argv[5];
+                script = `SELECT * FROM items WHERE date(completed_at) BETWEEN to_date('${date1}', 'DD/MM/YY') AND to_date('${date2}', 'DD/MM/YY')`
+                client.query(script, queryDoneCallback);
+                break;
+            default:
+                return console.log(`Error. Stat query not found.`)
+                break;
+        }
+    }
 };
 
 client.connect(clientConnectionCallback);
+
+
+// ======= HELPER FUNCTIONS ============
+const formatDisplay = res => {
+    res.rows.forEach(item => {
+        if (item.archived) {
+            return;
+        }
+        let box = `[ ]`
+        if (item.completion) {
+            box = `[X]`
+            let output = `${item.id}. ${box} - ${item.name} \n Created: ${item.created_at} \n Completed: ${item.completed_at} \n =======================`;
+            colorLog('green', output);
+        } else {
+            let output = `${item.id}. ${box} - ${item.name} \n Created: ${item.created_at} \n =======================`;
+            colorLog('red', output)
+        }
+    });
+};
+
+//Get the average time of completion for all the items.
+
+const getAvgTime = (err, res) => {
+    if (err) {
+        console.log("query error", err.message);
+    } else {
+        const array = res.rows
+        const theNums = array.map(item => item.mins_diff);
+        const theSum = theNums.reduce((a, b) => a + b);
+        const averageMins = (theSum / theNums.length).toFixed(1);
+        colorLog('lavender', `Average minutes to complete a task: ${averageMins}`)
+    }
+    client.end();
+};
+
+//Get the items with the longest (worst) and shortest (best) completion times.
+const bestWorst = (err, res) => {
+
+    err && console.log(`Query error`, err.message)
+
+    const array = res.rows;
+    const best = array.shift();
+    const worst = array.pop();
+    let itemDisplay = item => `${item.id}. ${item.name} | Completed in ${item.mins_diff} mins`
+    let output = `Fastest item: \n ${itemDisplay(best)} \n\n Slowest item: \n ${itemDisplay(worst)}`
+    colorLog('lavender', output);
+    client.end();
+}
+
+const avgItemsPerDay = (err, res) => {
+    err && console.log(`Query error`, err.message)
+    const array = res.rows;
+    let noOfDays = 1;
+
+    array.forEach((item, index) => {
+        let nextItem = array[index+1]
+        let thisDate = item.date.toString();
+
+        //If this is not the last item in the array
+        if (nextItem) {
+            let nextDate = nextItem.date.toString();
+
+            //And the next date is not the same, add to noOf Days.
+            if (thisDate!==nextDate) {
+                noOfDays++;        
+            }
+            //If this is the last item in the array, save the latest count into the array.
+        }
+    })
+    const avgNoPerDay = array.length / noOfDays;
+    colorLog('lavender', `Average number of items created per day = ${avgNoPerDay}`);
+    client.end();
+}
+
+
+//Function to format colors of console logs: lavender, green or red.
+const colorLog = (col, output) => {
+    let r;
+    let g;
+    let b
+    switch (col) {
+        case 'lavender':
+            r = 181;
+            g = 126;
+            b = 220
+            break;
+        case 'red':
+            r = 230;
+            g = 0;
+            b = 0;
+            break;
+        case 'green':
+            r = 0;
+            g = 230;
+            b = 0
+            break;
+        case 'white':
+            r = 255;
+            g = 255;
+            b = 255;
+            break;
+        default:
+            r = 255;
+            g = 255;
+            b = 255;
+            break;
+    }
+    console.log(`\x1b[38;2;${r};${g};${b}m%s\x1b[0m`, output);
+}
\ No newline at end of file