I adore quickjs

quickjs rocks

let
	words = 'quickjs rocks',
	output = '';

for (let i = 1, len = words.length; i <= len; i++)
{
	for (let j = 0; j < i; j++)
	{
		output += '<blink>';
	}
	output += words[i - 1];
	for (let j = 0; j < i; j++)
	{
		output += '</blink>';
	}
}

console.log('<b>' + output + '</b>');