G21 ; Set units to millimeters
G90 ; Use absolute positioning

; Move to the starting position
G0 X0 Y0

G0 Z-0.23 F200

; 1. Move up to start the vertical column of the "F"
G1 X0 Y6 F120

; 2. Move right to form the top stroke of the "F"
G1 X6 Y6 F120

; 3. Move down to start the first notch
G1 X6 Y5 F120

; 4. Move left for the top notch
G1 X3 Y5 F120

; 5. Move down to the initial position of the middle line
G1 X3 Y3 F120

; 6. Move right for the middle line
G1 X5 Y3 F120

; 7. Move down for the second notch
G1 X5 Y2 F120

; 8. Move left to complete the middle notch
G1 X3 Y2 F120

; 9. Move up to connect with the vertical column
G1 X3 Y0 F120

; 10. Move left to return to the starting position and close the letter "F"
G1 X0 Y0 F120

G0 Z0 F200