diff --git a/js/main.js b/js/main.js
index af6c6cf..a32336b 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1,11 +1,27 @@
 "use strict";
-console.log("Main script running.");
+
+/* Globally define the places where the preprocessed data is stored for READ ONLY ACCESS. */
+
+var circuits = null;
+var constructorResults = null;
+var constructors = null;
+var constructorStandings = null;
+var drivers = null;
+var driverStandings = null;
+var lapTimes = null;
+var pitStops = null;
+var qualifying = null;
+var races = null;
+var results = null;
+var seasons = null;
+
+/* Define the functions responsible for fetching+preprocessing data */
 
 // data/circuits.csv
 function fetchCircuits(callback) {
   d3.csv('data/circuits.csv', function(data) {
     // TODO: process data
-    var circuits = data;
+    circuits = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -14,7 +30,7 @@ function fetchCircuits(callback) {
 function fetchConstructorResults(callback) {
   d3.csv('data/constructorResults.csv', function(data) {
     // TODO: process data
-    var constructorResults = data;
+    constructorResults = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -23,7 +39,7 @@ function fetchConstructorResults(callback) {
 function fetchConstructors(callback) {
   d3.csv('data/constructors.csv', function(data) {
     // TODO: process data
-    var constructors = data;
+    constructors = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -32,7 +48,7 @@ function fetchConstructors(callback) {
 function fetchConstructorStandings(callback) {
   d3.csv('data/constructorStandings.csv', function(data) {
     // TODO: process data
-    var constructorStandings = data;
+    constructorStandings = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -41,7 +57,7 @@ function fetchConstructorStandings(callback) {
 function fetchDrivers(callback) {
   d3.csv('data/drivers.csv', function(data) {
     // TODO: process data
-    var drivers = data;
+    drivers = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -50,7 +66,7 @@ function fetchDrivers(callback) {
 function fetchDriverStandings(callback) {
   d3.csv('data/driverStandings.csv', function(data) {
     // TODO: process data
-    var driverStandings = data;
+    driverStandings = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -59,7 +75,7 @@ function fetchDriverStandings(callback) {
 function fetchLapTimes(callback) {
   d3.csv('data/lapTimes.csv', function(data) {
     // TODO: process data
-    var lapTimes = data;
+    lapTimes = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -68,7 +84,7 @@ function fetchLapTimes(callback) {
 function fetchPitStops(callback) {
   d3.csv('data/pitStops.csv', function(data) {
     // TODO: process data
-    var pitStops = data;
+    pitStops = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -77,7 +93,7 @@ function fetchPitStops(callback) {
 function fetchQualifying(callback) {
   d3.csv('data/qualifying.csv', function(data) {
     // TODO: process data
-    var qualifying = data;
+    qualifying = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -86,7 +102,7 @@ function fetchQualifying(callback) {
 function fetchRaces(callback) {
   d3.csv('data/races.csv', function(data) {
     // TODO: process data
-    var races = data;
+    races = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -95,7 +111,7 @@ function fetchRaces(callback) {
 function fetchResults(callback) {
   d3.csv('data/results.csv', function(data) {
     // TODO: process data
-    var results = data;
+    results = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -104,7 +120,7 @@ function fetchResults(callback) {
 function fetchSeasons(callback) {
   d3.csv('data/seasons.csv', function(data) {
     // TODO: process data
-    var seasons = data;
+    seasons = data;
     callback(null); // Tell the queue we're done.
   });
 }
@@ -118,6 +134,7 @@ function fetchStatus(callback) {
   });
 }
 
+/* This is where the actual control flow is defined */
 console.log("Let's load and preprocess all data properly.");
 
 // Create a queue, add all the fetch&process functions and await their results
@@ -136,7 +153,10 @@ d3.queue()
   .defer(fetchSeasons)
   .defer(fetchStatus)
   .await(function(error) {
+    // All data loaded by the deferred functions, now we're ready for business
+    // (call more functions :D)
     console.log("All done. Ready.");
     console.log(arguments);
     if(error) throw error;
   });
+