JS Output lost? No syntax Errors either 0.o

When I run the program I'm not getting any output or errors for that matter. Program is simple I have to generate 7 seven random numbers between 0-9 and store their value in an array then for each number in the array I have to use a for loop to output each value.

var motto = [];

var randomNum = Math.floor(Math.random()*10);

for (i = 0; i < 7; i++) { 

    motto.pop(randomNum);

}

for (i = 0; i < motto.length; i++) { 

    document.write(motto[i] + "<br>");
}