High Frequency PWM with Timers - Arduino Uno

Hey everybody,
I have used this code to generate a 8MHz signal from D6 Pin:

#include <TimerHelpers.h>

// Timer 0

// output OC0A pin 12 (D6)

const byte timer0OutputA = 6;

void setup() {
pinMode (timer0OutputA, OUTPUT);
TIMSK0 = 0; // no interrupts
Timer0::setMode (2, Timer0::PRESCALE_1, Timer0::TOGGLE_A_ON_COMPARE);
OCR0A = 0; // count to 2
} // end of setup

void loop() {}

This code works well,
but now I wanna add commands in LOOP function, so that I will get
a simple digital signal (DigitalWrite HIGH/LOW & delays) that will Blink a LED connected to
(D10) port.
When I'm adding these commands, the LED is turning on constantly and it's not blinking.
I will appreciate any help to resolve this and make it works!

Thank you in advance!

When I'm adding these commands, the LED is turning on constantly and it's not blinking.
I will appreciate any help to resolve this and make it works!

That's difficult because we haven't seen the code that provides problems.

Please edit your post and insert code tags and of course use code tags to post the problematic code part.