diff --git a/.vscode/markdown-styles.css b/.vscode/markdown-styles.css
new file mode 100644
index 0000000..b1b60d2
--- /dev/null
+++ b/.vscode/markdown-styles.css
@@ -0,0 +1,93 @@
+body {
+    background: #000e07;
+}
+
+h1, h2, h3, h4, h5, h6 {
+    font-weight: 600;
+}
+
+pre {
+    background: #0f1610 !important;
+}
+
+blockquote {
+    border-left-color: #2f7e25;
+    border-left-width: 3px;
+    background: #637d7510;
+}
+
+table {
+  table-layout: fixed;
+  width: 100%;
+}
+
+th,
+td {
+  background: #637d7510;
+  padding: 0.5rem;
+
+}
+
+tbody tr:nth-child(odd) {
+  background: #637d7510;
+}
+
+tbody tr:nth-child(even) {
+  background: #000e0740;
+}
+
+thead {
+    border-bottom-width: 0 !important;
+}
+th {
+    border-bottom: 0px !important;
+}
+
+span.hljs-comment {
+    color: #5a8055ad;
+}
+
+
+span.hljs-string, span.hljs-params {
+    color: #637d75;
+}
+
+span.hljs-built_in, span.hljs-title.class_, span.hljs-name {
+    color: #717f24;
+}
+
+span.hljs-keyword {
+    color: #2f7e25;
+}
+
+span.hljs-number {
+    color: #00e0c4;
+}
+
+span.hljs-attr, span.hljs-subst,  span.hljs-variable {
+    color: #327f77;
+}
+
+span.hljs-variable.language_ {
+    color: #7f2b27;
+}
+
+.code-line code, .code-line {
+    color: #637d75 !important;
+}
+
+code {
+    font-size: 15px;
+}
+
+span.hljs-property {
+    color: #2f6a7f;
+}
+
+span.hljs-title.function_, span.hljs-function {
+    color: #717f24 !important;
+}
+
+span.hljs-literal {
+    color: #18e000;
+}
diff --git a/Programming_Languages/Frameworks/React/Hooks/Memoization.md b/Programming_Languages/Frameworks/React/Hooks/Memoization.md
index 9b2ddf1..d1e486a 100644
--- a/Programming_Languages/Frameworks/React/Hooks/Memoization.md
+++ b/Programming_Languages/Frameworks/React/Hooks/Memoization.md
@@ -7,7 +7,7 @@ tags:
   - react-hooks
 ---
 
-# Memoization with `useCallback` and `useMemo`
+# Memoization with useCallback and useMemo
 
 ## Rationale
 
@@ -23,7 +23,7 @@ The `useCallback` hook is used to wrap functions. It tells React to not re-creat
 
 `useCallback` returns a memoized version of the callback function it is passed. This means that the function object returned from useCallback will be the same between re-renders.
 
-Remember that in JavaScript, functions are objects and components are functions. As a result, every time a component containing a function re-renders, it creates a new instance of the function in memory.
+Remember that in JavaScript, functions are objects and components are functions. As a result, every time a component containing a function re-renders, it create a new instance of the function in memory.
 
 > Given the same dependency value, the `useCallback` hook returns the same function instance between renderings (aka memoization).
 
diff --git a/Programming_Languages/Python/BBC_Course_Notes.md b/Programming_Languages/Python/BBC_Course_Notes.md
index ce71ab1..898f2bc 100644
--- a/Programming_Languages/Python/BBC_Course_Notes.md
+++ b/Programming_Languages/Python/BBC_Course_Notes.md
@@ -1,17 +1,17 @@
 # BBC Python Course notes
 
-## TODO:
+## Day 2
 
-## Numbers
+With lists you have to use copy if you wish to make a new version. You cannot just reassign to a new version. This will still update the original. Since it copies the pointer.
 
-## Control flow
+Distinguish functions that will create new list and methods which will modify existing list
 
-### Conditionals
+Functions: named parameter passing, use for default parameter values
 
-### While loops
+Python does not have constants but has a convention of upper case to mimic constants
 
-### For loops
+More on addresses and pointers in Python
 
-Add example of slightly odd ternary structure
+With classes we don't need to use `new` when instantiating an instance of a class.
 
-While, when we don't know how long
+You do not need to define properties in classes if they exist in the constructor
diff --git a/Programming_Languages/Python/Syntax/Tuples_in_Python.md b/Programming_Languages/Python/Syntax/Tuples_in_Python.md
index 35b53f1..f4dbb56 100644
--- a/Programming_Languages/Python/Syntax/Tuples_in_Python.md
+++ b/Programming_Languages/Python/Syntax/Tuples_in_Python.md
@@ -57,15 +57,31 @@ tup3 = ('apple', 'pear', 'orange', 'plum', 'apple')
 for x in tup3:
     print(x)
 
+"""
+apple
+pear
+orange
+plum
+apple
+"""
+
 print(tup3.count('apple'))
 print(tup3.index('pear'))
 
+# 2
+# 1
+
+
 if 'orange' in tup3:
     print('orange is in the Tuple')
 
+# orange is in the Tuple
+
 tuple1 = (1, 3, 5, 7)
 tuple2 = ('John', 'Denise', 'Phoebe', 'Adam')
 tuple3 = (42, tuple1, tuple2, 5.5)
 print(tuple3)
 
+# (42, (1, 3, 5, 7), ('John', 'Denise', 'Phoebe', 'Adam'), 5.5)
+
 ```
diff --git a/Programming_Languages/Shell/Expansions_and_substitutions.md b/Programming_Languages/Shell/Expansions_and_substitutions.md
index 0a93047..da549e0 100644
--- a/Programming_Languages/Shell/Expansions_and_substitutions.md
+++ b/Programming_Languages/Shell/Expansions_and_substitutions.md
@@ -33,7 +33,7 @@ echo /tmp/{1..3}/file.txt
 /tmp/1/file.txt  /tmp/2/file.txt /tmp/3/file.txt
 ```
 
-```
+```bash
 echo {1..5}
 1 2 3 4 5
 
@@ -46,7 +46,7 @@ a b c
 
 We can also set sequences. If we wanted to count to twenty in intervals of two
 
-```
+```bash
 echo {1..20..2}
 1 3 5 7 9 11 13 15 17 19
 ```
diff --git a/Programming_Languages/TypeScript/Custom_types.md b/Programming_Languages/TypeScript/Custom_types.md
index d13430d..cc290ff 100644
--- a/Programming_Languages/TypeScript/Custom_types.md
+++ b/Programming_Languages/TypeScript/Custom_types.md
@@ -15,7 +15,7 @@ So say we have this object:
 
 ```js
 const age = {
-  name: 'Thomas',
+  name: "Thomas",
   yearOfBirth: 1988,
   currentYear: 2021,
   ageNow: function () {
@@ -43,7 +43,7 @@ We could now re-write the first `age` object as an object of type `Age` :
 let thomas: typeof Age;
 
 thomas = {
-  name: 'Thomas',
+  name: "Thomas",
   yearOfBirth: 1988,
   currentYear: 2021,
   ageNow: function () {
@@ -67,7 +67,7 @@ We could then create objects based on this:
 
 ```tsx
 const thomas: Age = {
-  name: 'Thomas',
+  name: "Thomas",
   yearOfBirth: 1988,
   currentYear: 2021,
   ageNow: function () {
@@ -97,10 +97,10 @@ With custom (object types) this means that the following expression of an object
 
 ```tsx
 const martha = {
-  name: 'Martha',
+  name: "Martha",
   yearOfBirth: 1997,
   currentYear: 2021,
-  gender: 'female',
+  gender: "female",
 };
 
 const addition: Age = martha;
@@ -110,10 +110,10 @@ But if we tried to add this extra property whilst defining `martha` as an instan
 
 ```tsx
 const martha: Age = {
-  name: 'Martha',
+  name: "Martha",
   yearOfBirth: 1997,
   currentYear: 2021,
-  gender: 'female',
+  gender: "female",
 };
 ```
 
@@ -134,17 +134,17 @@ function logPoint(p: Point) {
 }
 
 // logs "12, 26"
-const point = {x: 12, y: 26};
+const point = { x: 12, y: 26 };
 logPoint(point);
 ```
 
 Shape matching only requires a subset of the object's fields to match:
 
 ```tsx
-const point3 = {x: 12, y: 26, z: 89};
+const point3 = { x: 12, y: 26, z: 89 };
 logPoint(point3); // logs "12, 26"
 
-const rect = {x: 33, y: 3, width: 30, height: 80};
+const rect = { x: 33, y: 3, width: 30, height: 80 };
 logPoint(rect);
 ```
 
diff --git a/Untitled.canvas b/Untitled.canvas
deleted file mode 100644
index 9e26dfe..0000000
--- a/Untitled.canvas
+++ /dev/null
@@ -1 +0,0 @@
-{}
\ No newline at end of file