Target marks as used for surveying usually have one thing in common: they are easy to recognise and have very clear boundaries and very well identifiable centres or points to which the marks refer. This can be a crosshair or an alternating black and white pattern with sharp edges. Why? Because it is consistent: you want to measure precisely, otherwise you wouldn't use marks and they should make the target even more identifiable through the mark - otherwise it wouldn't be necessary. The intention behind this is to clearly identify a target. I think that this also helps us in life: clear goals, not just so rough or blurred. The more precisely and clearly we formulate goals - be they small or large - the better we can identify, delimit and ultimately achieve them. Have you already had this experience?
I wish you an extraordinary day!