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Here's one method for using an if-loop to shuffle values from other arrays and create a new array:

1. Initialize an empty array to hold the shuffled values:

let shuffledArray = [];

1. Determine how many values you want to shuffle (this can be the length of an existing array or a specific number):

let numValuesToShuffle = 10;

1. Create a loop to iterate through the desired number of values:

for (let i = 0; i < numValuesToShuffle; i++) {
  // code to shuffle values will go here
}

1. Inside the loop, use an if-statement to randomly select a value from one of your source arrays and add it to the shuffledArray:

let randNum = Math.floor(Math.random() * 2); // generates a random number between 0 and 1
if (randNum === 0) {
  let randomIndex = Math.floor(Math.random() * array1.length);
  shuffledArray.push(array1[randomIndex]);
} else {
  let randomIndex = Math.floor(Math.random() * array2.length);
  shuffledArray.push(array2[randomIndex]);
}

1. Repeat this process for as many values as you want to shuffle.

Note: This method assumes that you have existing arrays from which you want to shuffle values. If you need to create new arrays with randomized values, you would need to modify this code accordingly. You could also modify the if-statement to shuffle values from more than two arrays.