Errata

I expected (and I have confirmed by a few experiments) that p5.js has the same scoping rule as javascript:
"Currently, JavaScript, unlike many other languages, does not support block level scoping. This means that declaring a variable inside of a block structure like a for loop, does not restrict that variable to the loop. Instead, the variable will be accessible from the entire function. It’s worth noting that the upcoming ECMAScript 6 will support block level scopes via the let keyword." from https://www.sitepoint.com/demystifying-javascript-variable-scope-hoisting/

Example #1:
var ii= 59;
function setcolors() {
console.log(ii);
for (var i = 0; i < 10; i++) {
...
}
}
console shows 59

Example #2:
var i= 59;
function setcolors() {
console.log(i);
for (var i = 0; i < 10; i++) {
...
}
}
console shows undefined