1. JavaScript Selection Statement Creating Array
window.setInterval(expression/function, time)

2. Selection Statement
Selection or conditional statements perform different actions based on different conditions
If Statement
Syntax
if( condition )
Statement
Semantics
Evaluate the condition (true or false)
If the condition is true
True: DO STATEMENT
False: SKIP the STATEMENT

3. Selection Statement Syntax: if…else if(condition){ }else { }
if the condition is true, the code in here is executed
}else {
if the code is false, the code in here is executed }

4. Creating Array Array object stores a list of values
Each value is an element of the Array and has an associated index
Create array with initial values
var arrayName = new Array(elment0, element1, element2, etc);

5. Creating Array Create array with size defined
var arrayName = new Array(3);
arrayName[0] = value;
arrayName[1] = value;
arrayName[2] = value;

6. SetInterval JavaScript execution in response to timer event
Write up the code you would like executed multiple time at regular interval
Use the setInterval of the window class
Syntax:
window.setInterval(expression/function , time in millisecond);