Generate a stunning black and white vector pencil sketch illustration featuring a rustic mountain barn with a Highland cow standing behind a wooden welcome sign that is planted in the ground. The artwork must be entirely monochromatic using only black ink on white background without any color elements. Create dramatic mountain peaks in the background using bold diagonal hatching for shadows. Render the weathered wooden barn with detailed planking texture and aged wood patterns. The wooden welcome sign should be staked into the ground with visible posts, positioned in the foreground with the cow standing naturally behind it. Depict the shaggy Highland cow with elaborate fur texture created through layered cross-hatching and flowing lines that show its long coat. Include pine trees with carefully drawn needle clusters using fine line work. The sign should show realistic wood texture with visible grain and the word 'WELCOME' carved or painted on it. Use atmospheric perspective with lighter lines for distant mountains. The composition should create natural depth with the sign in front, cow in middle ground, and barn with mountains in background. The style should reference vintage agricultural and tourism poster illustrations with authentic farm scene composition