Before starting, make an own brush
>new file>custompaper 50 pixel widh/50 height pixel>use pen tool on 1 pixel
Blending Brush Settings
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Brush Tip
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Diameter 35
Spacing 25
Shape dynamics
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Control: Pen pressure
Minimum Diameter 11 or 0 ( play around)
Angle Jitter 100
minimum Roundness 25
Scattering
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Scatter 62
Both Axes ON
Count 2
Count Jitter 94
Smoothing ON
Strength 2 %