Make a wonky French flag

Makefile

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+myprog.sna myprog.sld: main.asm
+	sjasmplus --sld=myprog.sld --fullpath main.asm
+
+clean:
+	rm -rf *.sna
+	rm -rf *.sld
+	rm -rf .tmp/
+
+.PHONY: clean

main.asm

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+code_start_addr EQU #8000
+    ORG code_start_addr
+
+ink_blue EQU 1
+paper_blue EQU 8
+ink_white EQU 7
+paper_white EQU 56
+ink_red EQU 2
+paper_red EQU 16
+bright EQU 64
+attribute_start EQU #5800
+stripe_width EQU 11
+stripe_height EQU 24
+screen_width EQU 32
+    
+    ; blue stripe first
+    ld hl, attribute_start ; top left corner
+    ld a, ink_blue | paper_blue | bright
+    call make_stripe
+    ; white
+    ld hl, attribute_start + stripe_width
+    ld a, ink_white | paper_white | bright
+    call make_stripe
+    ; red
+    ld hl, attribute_start + stripe_width * 2
+    ld a, ink_red | paper_red | bright
+    call make_stripe
+eternal_pause:
+    jr eternal_pause
+
+make_stripe:
+    ld c, stripe_height
+vertical_loop
+    ld b, stripe_width
+horizontal_loop:
+    ld (hl), a
+    inc hl
+    djnz horizontal_loop
+    ld de, screen_width - stripe_width
+    add hl, de
+    dec c
+    jr nz, vertical_loop
+    ret
+
+    DEVICE ZXSPECTRUM48
+    SLDOPT COMMENT WPMEM, LOGPOINT, ASSERTION
+    SAVESNA "myprog.sna", code_start_addr