"Create a full-screen image for a phone with a grey wall set against a matching grey background, giving a minimalist, monochromatic vibe. The wall should have a rough texture, like concrete, and centered on it is a handwritten text in black ink that reads 'Khalid Alqaisi.' The handwriting should be bold, slightly imperfect, and organic, as if freshly written. Keep the focus on the text, making sure it contrasts well with the grey tones, and ensure the image fits perfectly for a vertical phone screen."