How can I create custom silkscreen elements like circles on my PCB layout in KiCad using Python?
Creating custom silkscreen elements like circles on a PCB layout in KiCad can be scripted using Python. The script provided adds circular silkscreen borders around a specific area:

```python
import pcbnew

# Load the board
board = pcbnew.LoadBoard('copy.kicad_pcb')

# Define the center and radii for the circles
CENTER = (140, 95)
R1 = 1.0*25.4 # Inner radius
R2 = 2.00*25.4 # Outer radius

# Script for adding circles to the silkscreen layer
silkLayerId = find_layer(board, 'F.SilkS')
if silkLayerId == -1:
    print('Couldn't find silk screen layer')

for radius in [R1, R2]:
    circle = pcbnew.DRAWSEGMENT()
    circle.SetShape(pcbnew.S_CIRCLE)
    circle.SetCenter(pcbnew.wxPoint(CENTER[0]*SCALE, CENTER[1]*SCALE))
    start_coord = pcbnew.wxPoint(CENTER[0]*SCALE, (CENTER[1] + radius)*SCALE)
    circle.SetArcStart(start_coord)
    circle.SetLayer(silkLayerId)
    circle.SetWidth(int(0.5*SCALE))
    board.Add(circle)

board.Save('autogen.kicad_pcb')
```

This script shows how to add custom graphical elements to the silkscreen layer, enhancing the PCB's aesthetic and functional design.