Loop to check for number divisible by 4 and reducing by 75%.

moreSheep.js

var numSheep = 4;
var monthsToPrint = 12;

for (var monthNumber = 1; monthNumber <= monthsToPrint; monthNumber++) {

    if (monthNumber % 4 === 0) {
        numSheep = numSheep / 4;
        console.log("Removing " + numSheep * 3 + " sheep from the population. Phew!");
    } else if (numSheep > 10000) {
        numSheep = numSheep / 2;
        console.log("Removing " + numSheep + " sheep from the population. Phew!");
    }
    numSheep *= 4;
    console.log("There will be " + numSheep + " sheep after " + monthNumber + " month(s)!");
}