Yeah,
It looks like some slight overheating after about an inch. It also looks like you had trouble keeping up with the filler rod.
But not a bad early effort.
If you're using 1/16" filler, you'll have to do it quicker than 3/32", so 3/32" may be easier to begin with. I tend to like 1/16", to get smaller beads
TIG travel speed is slower than MIG and Stick, so you would do well to pick up your travel speed after the first inch or so, or carefully regulate the heat lower with a foot pedal, if you have one. I mean, a pedal isn't really needed for DC TIG, but if you heat saturate small metal coupons like that, without allowing some cooling between beads, it is a little trickier.
Your flashing light could be your welding lid flashing your eyes, as the sensativity setting may not be low enough.
Or, maybe you blocked the sensors on your welding lid or dipped the tungsten, both of which the welding lid may have sensed, wrongly, as a momentary extinguishing of the arc, which made the lens un-darkened, briefly.
You can prevent that by setting the DELAY on your welding lid to a couple seconds or so, e.g., the sensors will tolerate being briefly obstructed without flashing your eyes, and a little delay is good since glowing metal can be harsh on the eyes too.
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