function fibonacciGenerator (n) {
    let output = []
    if (n === 1) { 
        return output=[0]
    }
    else if (n === 2) { 
        return output=[0,1]
    }
    else {
output=[0,1]
for (let i=2; i<n; i++) {
      output.push(output[output.length-2] + output[output.length-1]); 
        }  
return output 
}  
}