Crash with strange pixel pattern

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was wondering if of had come across problem before. started getting strange crashes today. whenever macbook crashes, strange squiggly pixel patterns appear. cannot boot past grey apple screen loading wheel. attaching few terrible pics took phone suffice. i've tried resets know of, no success booting yet. hoping isn't serious hardware issue. me out here guys. thank you!
 

attached files:

which model of system have?
 


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